/*  Prototype JavaScript framework, version 1.6.0.2
*  (c) 2005-2008 Sam Stephenson
*
*  Prototype is freely distributable under the terms of an MIT-style license.
*  For details, see the Prototype web site: http://www.prototypejs.org/
*
*--------------------------------------------------------------------------*/

var Prototype = {
Version: '1.6.0.2',

Browser: {
IE:     !!(window.attachEvent && !window.opera),
Opera:  !!window.opera,
WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
},

BrowserFeatures: {
XPath: !!document.evaluate,
ElementExtensions: !!window.HTMLElement,
SpecificElementExtensions:
document.createElement('div').__proto__ &&
document.createElement('div').__proto__ !==
document.createElement('form').__proto__
},

ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
		JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
		
		emptyFunction: function() { },
		K: function(x) { return x }
		};
		
		if (Prototype.Browser.MobileSafari)
		Prototype.BrowserFeatures.SpecificElementExtensions = false;
		
		
		/* Based on Alex Arnell's inheritance implementation. */
		var Class = {
		create: function() {
		var parent = null, properties = $A(arguments);
		if (Object.isFunction(properties[0]))
		parent = properties.shift();
		
		function klass() {
		this.initialize.apply(this, arguments);
		}
		
		Object.extend(klass, Class.Methods);
		klass.superclass = parent;
		klass.subclasses = [];
		
		if (parent) {
		var subclass = function() { };
		subclass.prototype = parent.prototype;
		klass.prototype = new subclass;
		parent.subclasses.push(klass);
		}
		
		for (var i = 0; i < properties.length; i++)
				    klass.addMethods(properties[i]);
				    
				    if (!klass.prototype.initialize)
				    klass.prototype.initialize = Prototype.emptyFunction;
				    
				    klass.prototype.constructor = klass;
				    
				    return klass;
				    }
				    };
				    
				    Class.Methods = {
				    addMethods: function(source) {
				    var ancestor   = this.superclass && this.superclass.prototype;
				    var properties = Object.keys(source);
				    
				    if (!Object.keys({ toString: true }).length)
				    properties.push("toString", "valueOf");
				    
				    for (var i = 0, length = properties.length; i < length; i++) {
										var property = properties[i], value = source[property];
										if (ancestor && Object.isFunction(value) &&
										value.argumentNames().first() == "$super") {
										var method = value, value = Object.extend((function(m) {
										return function() { return ancestor[m].apply(this, arguments) };
										})(property).wrap(method), {
										valueOf:  function() { return method },
										toString: function() { return method.toString() }
										});
										}
										this.prototype[property] = value;
										}
										
										return this;
										}
										};
										
										var Abstract = { };
										
										Object.extend = function(destination, source) {
										for (var property in source)
										destination[property] = source[property];
										return destination;
										};
										
										Object.extend(Object, {
										inspect: function(object) {
										try {
										if (Object.isUndefined(object)) return 'undefined';
										if (object === null) return 'null';
										return object.inspect ? object.inspect() : String(object);
										} catch (e) {
										if (e instanceof RangeError) return '...';
										throw e;
										}
										},
										
										toJSON: function(object) {
										var type = typeof object;
										switch (type) {
										case 'undefined':
										case 'function':
										case 'unknown': return;
										case 'boolean': return object.toString();
										}
										
										if (object === null) return 'null';
										if (object.toJSON) return object.toJSON();
										if (Object.isElement(object)) return;
										
										var results = [];
										for (var property in object) {
										var value = Object.toJSON(object[property]);
										if (!Object.isUndefined(value))
										results.push(property.toJSON() + ': ' + value);
										}
										
										return '{' + results.join(', ') + '}';
										},
										
										toQueryString: function(object) {
										return $H(object).toQueryString();
										},
										
										toHTML: function(object) {
										return object && object.toHTML ? object.toHTML() : String.interpret(object);
										},
										
										keys: function(object) {
										var keys = [];
										for (var property in object)
										keys.push(property);
										return keys;
										},
										
										values: function(object) {
										var values = [];
										for (var property in object)
										values.push(object[property]);
										return values;
										},
										
										clone: function(object) {
										return Object.extend({ }, object);
										},
										
										isElement: function(object) {
										return object && object.nodeType == 1;
										},
										
										isArray: function(object) {
										return object != null && typeof object == "object" &&
										'splice' in object && 'join' in object;
										},
										
										isHash: function(object) {
										return object instanceof Hash;
										},
										
										isFunction: function(object) {
										return typeof object == "function";
										},
										
										isString: function(object) {
										return typeof object == "string";
										},
										
										isNumber: function(object) {
										return typeof object == "number";
										},
										
										isUndefined: function(object) {
										return typeof object == "undefined";
										}
										});
										
										Object.extend(Function.prototype, {
										argumentNames: function() {
										var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
										return names.length == 1 && !names[0] ? [] : names;
										},
										
										bind: function() {
										if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
										var __method = this, args = $A(arguments), object = args.shift();
										return function() {
										return __method.apply(object, args.concat($A(arguments)));
										}
										},
										
										bindAsEventListener: function() {
										var __method = this, args = $A(arguments), object = args.shift();
										return function(event) {
										return __method.apply(object, [event || window.event].concat(args));
										}
										},
										
										curry: function() {
										if (!arguments.length) return this;
										var __method = this, args = $A(arguments);
										return function() {
										return __method.apply(this, args.concat($A(arguments)));
										}
										},
										
										delay: function() {
										var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
										return window.setTimeout(function() {
										return __method.apply(__method, args);
										}, timeout);
										},
										
										wrap: function(wrapper) {
										var __method = this;
										return function() {
										return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
										}
										},
										
										methodize: function() {
										if (this._methodized) return this._methodized;
										var __method = this;
										return this._methodized = function() {
										return __method.apply(null, [this].concat($A(arguments)));
										};
										}
										});
										
										Function.prototype.defer = Function.prototype.delay.curry(0.01);
										
										Date.prototype.toJSON = function() {
										return '"' + this.getUTCFullYear() + '-' +
										(this.getUTCMonth() + 1).toPaddedString(2) + '-' +
										this.getUTCDate().toPaddedString(2) + 'T' +
										this.getUTCHours().toPaddedString(2) + ':' +
										this.getUTCMinutes().toPaddedString(2) + ':' +
										this.getUTCSeconds().toPaddedString(2) + 'Z"';
										};
										
										var Try = {
										these: function() {
										var returnValue;
										
										for (var i = 0, length = arguments.length; i < length; i++) {
										var lambda = arguments[i];
										try {
										returnValue = lambda();
										break;
										} catch (e) { }
										}
										
										return returnValue;
										}
										};
										
										RegExp.prototype.match = RegExp.prototype.test;
										
										RegExp.escape = function(str) {
										return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
										};
										
										/*--------------------------------------------------------------------------*/
										
										var PeriodicalExecuter = Class.create({
										initialize: function(callback, frequency) {
										this.callback = callback;
										this.frequency = frequency;
										this.currentlyExecuting = false;
										
										this.registerCallback();
										},
										
										registerCallback: function() {
										this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
										},
										
										execute: function() {
										this.callback(this);
										},
										
										stop: function() {
										if (!this.timer) return;
										clearInterval(this.timer);
										this.timer = null;
										},
										
										onTimerEvent: function() {
										if (!this.currentlyExecuting) {
										try {
										this.currentlyExecuting = true;
										this.execute();
										} finally {
										this.currentlyExecuting = false;
										}
										}
										}
										});
										Object.extend(String, {
										interpret: function(value) {
										return value == null ? '' : String(value);
										},
										specialChar: {
										'\b': '\\b',
										'\t': '\\t',
										'\n': '\\n',
										'\f': '\\f',
										'\r': '\\r',
										'\\': '\\\\'
										}
										});
										
										Object.extend(String.prototype, {
										gsub: function(pattern, replacement) {
										var result = '', source = this, match;
										replacement = arguments.callee.prepareReplacement(replacement);
										
										while (source.length > 0) {
										if (match = source.match(pattern)) {
										result += source.slice(0, match.index);
										result += String.interpret(replacement(match));
										source  = source.slice(match.index + match[0].length);
										} else {
										result += source, source = '';
										}
										}
										return result;
										},
										
										sub: function(pattern, replacement, count) {
										replacement = this.gsub.prepareReplacement(replacement);
										count = Object.isUndefined(count) ? 1 : count;
										
										return this.gsub(pattern, function(match) {
										if (--count < 0) return match[0];
										return replacement(match);
										});
										},
										
										scan: function(pattern, iterator) {
										this.gsub(pattern, iterator);
										return String(this);
										},
										
										truncate: function(length, truncation) {
										length = length || 30;
										truncation = Object.isUndefined(truncation) ? '...' : truncation;
										return this.length > length ?
										this.slice(0, length - truncation.length) + truncation : String(this);
										},
										
										strip: function() {
										return this.replace(/^\s+/, '').replace(/\s+$/, '');
										},
										
										stripTags: function() {
										return this.replace(/<\/?[^>]+>/gi, '');
										},
										
										stripScripts: function() {
										return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
										},
										
										extractScripts: function() {
										var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
										var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
										return (this.match(matchAll) || []).map(function(scriptTag) {
										return (scriptTag.match(matchOne) || ['', ''])[1];
										});
										},
										
										evalScripts: function() {
										return this.extractScripts().map(function(script) { return eval(script) });
										},
										
										escapeHTML: function() {
										var self = arguments.callee;
										self.text.data = this;
										return self.div.innerHTML;
										},
										
										unescapeHTML: function() {
										var div = new Element('div');
										div.innerHTML = this.stripTags();
										return div.childNodes[0] ? (div.childNodes.length > 1 ?
										$A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
										div.childNodes[0].nodeValue) : '';
										},
										
										toQueryParams: function(separator) {
										var match = this.strip().match(/([^?#]*)(#.*)?$/);
										if (!match) return { };
										
										return match[1].split(separator || '&').inject({ }, function(hash, pair) {
										if ((pair = pair.split('='))[0]) {
										var key = decodeURIComponent(pair.shift());
										var value = pair.length > 1 ? pair.join('=') : pair[0];
										if (value != undefined) value = decodeURIComponent(value);
										
										if (key in hash) {
										if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
										hash[key].push(value);
										}
										else hash[key] = value;
										}
										return hash;
										});
										},
										
										toArray: function() {
										return this.split('');
										},
										
										succ: function() {
										return this.slice(0, this.length - 1) +
										String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
										},
										
										times: function(count) {
										return count < 1 ? '' : new Array(count + 1).join(this);
										},
										
										camelize: function() {
										var parts = this.split('-'), len = parts.length;
										if (len == 1) return parts[0];
										
										var camelized = this.charAt(0) == '-'
										? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
										: parts[0];
										
										for (var i = 1; i < len; i++)
										camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
										
										return camelized;
										},
										
										capitalize: function() {
										return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
										},
										
										underscore: function() {
										return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
										},
										
										dasherize: function() {
										return this.gsub(/_/,'-');
										},
										
										inspect: function(useDoubleQuotes) {
										var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
										var character = String.specialChar[match[0]];
										return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
										});
										if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
										return "'" + escapedString.replace(/'/g, '\\\'') + "'";
										},
										
										toJSON: function() {
										return this.inspect(true);
										},
										
										unfilterJSON: function(filter) {
										return this.sub(filter || Prototype.JSONFilter, '#{1}');
										},
										
										isJSON: function() {
										var str = this;
										if (str.blank()) return false;
										str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
										return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
										},
										
										evalJSON: function(sanitize) {
										var json = this.unfilterJSON();
										try {
										if (!sanitize || json.isJSON()) return eval('(' + json + ')');
										} catch (e) { }
										throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
										},
										
										include: function(pattern) {
										return this.indexOf(pattern) > -1;
										},
										
										startsWith: function(pattern) {
										return this.indexOf(pattern) === 0;
										},
										
										endsWith: function(pattern) {
										var d = this.length - pattern.length;
										return d >= 0 && this.lastIndexOf(pattern) === d;
										},
										
										empty: function() {
										return this == '';
										},
										
										blank: function() {
										return /^\s*$/.test(this);
										},
										
										interpolate: function(object, pattern) {
										return new Template(this, pattern).evaluate(object);
										}
										});
										
										if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
										escapeHTML: function() {
										return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
								},
								unescapeHTML: function() {
								return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
									}
									});
									
									String.prototype.gsub.prepareReplacement = function(replacement) {
									if (Object.isFunction(replacement)) return replacement;
									var template = new Template(replacement);
									return function(match) { return template.evaluate(match) };
									};
									
									String.prototype.parseQuery = String.prototype.toQueryParams;
									
									Object.extend(String.prototype.escapeHTML, {
									div:  document.createElement('div'),
									text: document.createTextNode('')
									});
									
									with (String.prototype.escapeHTML) div.appendChild(text);
									
									var Template = Class.create({
									initialize: function(template, pattern) {
									this.template = template.toString();
									this.pattern = pattern || Template.Pattern;
									},
									
									evaluate: function(object) {
									if (Object.isFunction(object.toTemplateReplacements))
									object = object.toTemplateReplacements();
									
									return this.template.gsub(this.pattern, function(match) {
									if (object == null) return '';
									
									var before = match[1] || '';
									if (before == '\\') return match[2];
									
									var ctx = object, expr = match[3];
									var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
									match = pattern.exec(expr);
									if (match == null) return before;
									
									while (match != null) {
									var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
									ctx = ctx[comp];
									if (null == ctx || '' == match[3]) break;
									expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
									match = pattern.exec(expr);
									}
									
									return before + String.interpret(ctx);
									});
									}
									});
									Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
									
									var $break = { };
									
									var Enumerable = {
									each: function(iterator, context) {
									var index = 0;
									iterator = iterator.bind(context);
									try {
									this._each(function(value) {
									iterator(value, index++);
									});
									} catch (e) {
									if (e != $break) throw e;
									}
									return this;
									},
									
									eachSlice: function(number, iterator, context) {
									iterator = iterator ? iterator.bind(context) : Prototype.K;
									var index = -number, slices = [], array = this.toArray();
									while ((index += number) < array.length)
										slices.push(array.slice(index, index+number));
										return slices.collect(iterator, context);
										},
										
										all: function(iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var result = true;
										this.each(function(value, index) {
										result = result && !!iterator(value, index);
										if (!result) throw $break;
										});
										return result;
										},
										
										any: function(iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var result = false;
										this.each(function(value, index) {
										if (result = !!iterator(value, index))
										throw $break;
										});
										return result;
										},
										
										collect: function(iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var results = [];
										this.each(function(value, index) {
										results.push(iterator(value, index));
										});
										return results;
										},
										
										detect: function(iterator, context) {
										iterator = iterator.bind(context);
										var result;
										this.each(function(value, index) {
										if (iterator(value, index)) {
										result = value;
										throw $break;
										}
										});
										return result;
										},
										
										findAll: function(iterator, context) {
										iterator = iterator.bind(context);
										var results = [];
										this.each(function(value, index) {
										if (iterator(value, index))
										results.push(value);
										});
										return results;
										},
										
										grep: function(filter, iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var results = [];
										
										if (Object.isString(filter))
										filter = new RegExp(filter);
										
										this.each(function(value, index) {
										if (filter.match(value))
										results.push(iterator(value, index));
										});
										return results;
										},
										
										include: function(object) {
										if (Object.isFunction(this.indexOf))
										if (this.indexOf(object) != -1) return true;
										
										var found = false;
										this.each(function(value) {
										if (value == object) {
										found = true;
										throw $break;
										}
										});
										return found;
										},
										
										inGroupsOf: function(number, fillWith) {
										fillWith = Object.isUndefined(fillWith) ? null : fillWith;
										return this.eachSlice(number, function(slice) {
										while(slice.length < number) slice.push(fillWith);
										return slice;
										});
										},
										
										inject: function(memo, iterator, context) {
										iterator = iterator.bind(context);
										this.each(function(value, index) {
										memo = iterator(memo, value, index);
										});
										return memo;
										},
										
										invoke: function(method) {
										var args = $A(arguments).slice(1);
										return this.map(function(value) {
										return value[method].apply(value, args);
										});
										},
										
										max: function(iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var result;
										this.each(function(value, index) {
										value = iterator(value, index);
										if (result == null || value >= result)
										result = value;
										});
										return result;
										},
										
										min: function(iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var result;
										this.each(function(value, index) {
										value = iterator(value, index);
										if (result == null || value < result)
										result = value;
										});
										return result;
										},
										
										partition: function(iterator, context) {
										iterator = iterator ? iterator.bind(context) : Prototype.K;
										var trues = [], falses = [];
										this.each(function(value, index) {
										(iterator(value, index) ?
										trues : falses).push(value);
										});
										return [trues, falses];
										},
										
										pluck: function(property) {
										var results = [];
										this.each(function(value) {
										results.push(value[property]);
										});
										return results;
										},
										
										reject: function(iterator, context) {
										iterator = iterator.bind(context);
										var results = [];
										this.each(function(value, index) {
										if (!iterator(value, index))
										results.push(value);
										});
										return results;
										},
										
										sortBy: function(iterator, context) {
										iterator = iterator.bind(context);
										return this.map(function(value, index) {
										return {value: value, criteria: iterator(value, index)};
										}).sort(function(left, right) {
										var a = left.criteria, b = right.criteria;
										return a < b ? -1 : a > b ? 1 : 0;
										}).pluck('value');
										},
										
										toArray: function() {
										return this.map();
										},
										
										zip: function() {
										var iterator = Prototype.K, args = $A(arguments);
										if (Object.isFunction(args.last()))
										iterator = args.pop();
										
										var collections = [this].concat(args).map($A);
										return this.map(function(value, index) {
										return iterator(collections.pluck(index));
										});
										},
										
										size: function() {
										return this.toArray().length;
										},
										
										inspect: function() {
										return '#<Enumerable:' + this.toArray().inspect() + '>';
										}
										};
										
										Object.extend(Enumerable, {
										map:     Enumerable.collect,
										find:    Enumerable.detect,
										select:  Enumerable.findAll,
										filter:  Enumerable.findAll,
										member:  Enumerable.include,
										entries: Enumerable.toArray,
										every:   Enumerable.all,
										some:    Enumerable.any
										});
										function $A(iterable) {
										if (!iterable) return [];
										if (iterable.toArray) return iterable.toArray();
										var length = iterable.length || 0, results = new Array(length);
										while (length--) results[length] = iterable[length];
										return results;
										}
										
										if (Prototype.Browser.WebKit) {
										$A = function(iterable) {
										if (!iterable) return [];
										if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
										iterable.toArray) return iterable.toArray();
										var length = iterable.length || 0, results = new Array(length);
										while (length--) results[length] = iterable[length];
										return results;
										};
										}
										
										Array.from = $A;
										
										Object.extend(Array.prototype, Enumerable);
										
										if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;
										
										Object.extend(Array.prototype, {
										_each: function(iterator) {
										for (var i = 0, length = this.length; i < length; i++)
										iterator(this[i]);
										},
										
										clear: function() {
										this.length = 0;
										return this;
										},
										
										first: function() {
										return this[0];
										},
										
										last: function() {
										return this[this.length - 1];
										},
										
										compact: function() {
										return this.select(function(value) {
										return value != null;
										});
										},
										
										flatten: function() {
										return this.inject([], function(array, value) {
										return array.concat(Object.isArray(value) ?
										value.flatten() : [value]);
										});
										},
										
										without: function() {
										var values = $A(arguments);
										return this.select(function(value) {
										return !values.include(value);
										});
										},
										
										reverse: function(inline) {
										return (inline !== false ? this : this.toArray())._reverse();
										},
										
										reduce: function() {
										return this.length > 1 ? this : this[0];
										},
										
										uniq: function(sorted) {
										return this.inject([], function(array, value, index) {
										if (0 == index || (sorted ? array.last() != value : !array.include(value)))
										array.push(value);
										return array;
										});
										},
										
										intersect: function(array) {
										return this.uniq().findAll(function(item) {
										return array.detect(function(value) { return item === value });
										});
										},
										
										clone: function() {
										return [].concat(this);
										},
										
										size: function() {
										return this.length;
										},
										
										inspect: function() {
										return '[' + this.map(Object.inspect).join(', ') + ']';
										},
										
										toJSON: function() {
										var results = [];
										this.each(function(object) {
										var value = Object.toJSON(object);
										if (!Object.isUndefined(value)) results.push(value);
										});
										return '[' + results.join(', ') + ']';
										}
										});
										
										// use native browser JS 1.6 implementation if available
										if (Object.isFunction(Array.prototype.forEach))
										Array.prototype._each = Array.prototype.forEach;
										
										if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
										i || (i = 0);
										var length = this.length;
										if (i < 0) i = length + i;
										for (; i < length; i++)
										if (this[i] === item) return i;
										return -1;
										};
										
										if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
										i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
										var n = this.slice(0, i).reverse().indexOf(item);
										return (n < 0) ? n : i - n - 1;
										};
										
										Array.prototype.toArray = Array.prototype.clone;
										
										function $w(string) {
										if (!Object.isString(string)) return [];
										string = string.strip();
										return string ? string.split(/\s+/) : [];
										}
										
										if (Prototype.Browser.Opera){
										Array.prototype.concat = function() {
										var array = [];
										for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
										for (var i = 0, length = arguments.length; i < length; i++) {
										if (Object.isArray(arguments[i])) {
										for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
										array.push(arguments[i][j]);
										} else {
										array.push(arguments[i]);
										}
										}
										return array;
										};
										}
										Object.extend(Number.prototype, {
										toColorPart: function() {
										return this.toPaddedString(2, 16);
										},
										
										succ: function() {
										return this + 1;
										},
										
										times: function(iterator) {
										$R(0, this, true).each(iterator);
										return this;
										},
										
										toPaddedString: function(length, radix) {
										var string = this.toString(radix || 10);
										return '0'.times(length - string.length) + string;
										},
										
										toJSON: function() {
										return isFinite(this) ? this.toString() : 'null';
										}
										});
										
										$w('abs round ceil floor').each(function(method){
										Number.prototype[method] = Math[method].methodize();
										});
										function $H(object) {
										return new Hash(object);
										};
										
										var Hash = Class.create(Enumerable, (function() {
										
										function toQueryPair(key, value) {
										if (Object.isUndefined(value)) return key;
										return key + '=' + encodeURIComponent(String.interpret(value));
										}
										
										return {
										initialize: function(object) {
										this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
										},
										
										_each: function(iterator) {
										for (var key in this._object) {
										var value = this._object[key], pair = [key, value];
										pair.key = key;
										pair.value = value;
										iterator(pair);
										}
										},
										
										set: function(key, value) {
										return this._object[key] = value;
										},
										
										get: function(key) {
										return this._object[key];
										},
										
										unset: function(key) {
										var value = this._object[key];
										delete this._object[key];
										return value;
										},
										
										toObject: function() {
										return Object.clone(this._object);
										},
										
										keys: function() {
										return this.pluck('key');
										},
										
										values: function() {
										return this.pluck('value');
										},
										
										index: function(value) {
										var match = this.detect(function(pair) {
										return pair.value === value;
										});
										return match && match.key;
										},
										
										merge: function(object) {
										return this.clone().update(object);
										},
										
										update: function(object) {
										return new Hash(object).inject(this, function(result, pair) {
										result.set(pair.key, pair.value);
										return result;
										});
										},
										
										toQueryString: function() {
										return this.map(function(pair) {
										var key = encodeURIComponent(pair.key), values = pair.value;
										
										if (values && typeof values == 'object') {
										if (Object.isArray(values))
										return values.map(toQueryPair.curry(key)).join('&');
										}
										return toQueryPair(key, values);
										}).join('&');
										},
										
										inspect: function() {
										return '#<Hash:{' + this.map(function(pair) {
										return pair.map(Object.inspect).join(': ');
										}).join(', ') + '}>';
										},
										
										toJSON: function() {
										return Object.toJSON(this.toObject());
										},
										
										clone: function() {
										return new Hash(this);
										}
										}
										})());
										
										Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
										Hash.from = $H;
										var ObjectRange = Class.create(Enumerable, {
										initialize: function(start, end, exclusive) {
										this.start = start;
										this.end = end;
										this.exclusive = exclusive;
										},
										
										_each: function(iterator) {
										var value = this.start;
										while (this.include(value)) {
										iterator(value);
										value = value.succ();
										}
										},
										
										include: function(value) {
										if (value < this.start)
										return false;
										if (this.exclusive)
										return value < this.end;
										return value <= this.end;
										}
										});
										
										var $R = function(start, end, exclusive) {
										return new ObjectRange(start, end, exclusive);
										};
										
										var Ajax = {
										getTransport: function() {
										return Try.these(
										function() {return new XMLHttpRequest()},
										function() {return new ActiveXObject('Msxml2.XMLHTTP')},
										function() {return new ActiveXObject('Microsoft.XMLHTTP')}
										) || false;
										},
										
										activeRequestCount: 0
										};
										
										Ajax.Responders = {
										responders: [],
										
										_each: function(iterator) {
										this.responders._each(iterator);
										},
										
										register: function(responder) {
										if (!this.include(responder))
										this.responders.push(responder);
										},
										
										unregister: function(responder) {
										this.responders = this.responders.without(responder);
										},
										
										dispatch: function(callback, request, transport, json) {
										this.each(function(responder) {
										if (Object.isFunction(responder[callback])) {
										try {
										responder[callback].apply(responder, [request, transport, json]);
										} catch (e) { }
										}
										});
										}
										};
										
										Object.extend(Ajax.Responders, Enumerable);
										
										Ajax.Responders.register({
										onCreate:   function() { Ajax.activeRequestCount++ },
										onComplete: function() { Ajax.activeRequestCount-- }
										});
										
										Ajax.Base = Class.create({
										initialize: function(options) {
										this.options = {
										method:       'post',
										asynchronous: true,
										contentType:  'application/x-www-form-urlencoded',
										encoding:     'UTF-8',
										parameters:   '',
										evalJSON:     true,
										evalJS:       true
										};
										Object.extend(this.options, options || { });
										
										this.options.method = this.options.method.toLowerCase();
										
										if (Object.isString(this.options.parameters))
										this.options.parameters = this.options.parameters.toQueryParams();
										else if (Object.isHash(this.options.parameters))
										this.options.parameters = this.options.parameters.toObject();
										}
										});
										
										Ajax.Request = Class.create(Ajax.Base, {
										_complete: false,
										
										initialize: function($super, url, options) {
										$super(options);
										this.transport = Ajax.getTransport();
										this.request(url);
										},
										
										request: function(url) {
										this.url = url;
										this.method = this.options.method;
										var params = Object.clone(this.options.parameters);
										
										if (!['get', 'post'].include(this.method)) {
										// simulate other verbs over post
										params['_method'] = this.method;
										this.method = 'post';
										}
										
										this.parameters = params;
										
										if (params = Object.toQueryString(params)) {
										// when GET, append parameters to URL
										if (this.method == 'get')
										this.url += (this.url.include('?') ? '&' : '?') + params;
										else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
										params += '&_=';
										}
										
										try {
										var response = new Ajax.Response(this);
										if (this.options.onCreate) this.options.onCreate(response);
										Ajax.Responders.dispatch('onCreate', this, response);
										
										this.transport.open(this.method.toUpperCase(), this.url,
										this.options.asynchronous);
										
										if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
										
										this.transport.onreadystatechange = this.onStateChange.bind(this);
										this.setRequestHeaders();
										
										this.body = this.method == 'post' ? (this.options.postBody || params) : null;
										this.transport.send(this.body);
										
										/* Force Firefox to handle ready state 4 for synchronous requests */
										if (!this.options.asynchronous && this.transport.overrideMimeType)
										this.onStateChange();
										
										}
										catch (e) {
										this.dispatchException(e);
										}
										},
										
										onStateChange: function() {
										var readyState = this.transport.readyState;
										if (readyState > 1 && !((readyState == 4) && this._complete))
										this.respondToReadyState(this.transport.readyState);
										},
										
										setRequestHeaders: function() {
										var headers = {
										'X-Requested-With': 'XMLHttpRequest',
										'X-Prototype-Version': Prototype.Version,
										'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
										};
										
										if (this.method == 'post') {
										headers['Content-type'] = this.options.contentType +
										(this.options.encoding ? '; charset=' + this.options.encoding : '');
										
										/* Force "Connection: close" for older Mozilla browsers to work
										* around a bug where XMLHttpRequest sends an incorrect
										* Content-length header. See Mozilla Bugzilla #246651.
										*/
										if (this.transport.overrideMimeType &&
										(navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
										headers['Connection'] = 'close';
										}
										
										// user-defined headers
										if (typeof this.options.requestHeaders == 'object') {
										var extras = this.options.requestHeaders;
										
										if (Object.isFunction(extras.push))
										for (var i = 0, length = extras.length; i < length; i += 2)
										headers[extras[i]] = extras[i+1];
										else
										$H(extras).each(function(pair) { headers[pair.key] = pair.value });
										}
										
										for (var name in headers)
										this.transport.setRequestHeader(name, headers[name]);
										},
										
										success: function() {
										var status = this.getStatus();
										return !status || (status >= 200 && status < 300);
										},
										
										getStatus: function() {
										try {
										return this.transport.status || 0;
										} catch (e) { return 0 }
										},
										
										respondToReadyState: function(readyState) {
										var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
										
										if (state == 'Complete') {
										try {
										this._complete = true;
										(this.options['on' + response.status]
										|| this.options['on' + (this.success() ? 'Success' : 'Failure')]
										|| Prototype.emptyFunction)(response, response.headerJSON);
										} catch (e) {
										this.dispatchException(e);
										}
										
										var contentType = response.getHeader('Content-type');
										if (this.options.evalJS == 'force'
										|| (this.options.evalJS && this.isSameOrigin() && contentType
										&& contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
										this.evalResponse();
										}
										
										try {
										(this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
										Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
										} catch (e) {
										this.dispatchException(e);
										}
										
										if (state == 'Complete') {
										// avoid memory leak in MSIE: clean up
										this.transport.onreadystatechange = Prototype.emptyFunction;
										}
										},
										
										isSameOrigin: function() {
										var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
										return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
										protocol: location.protocol,
										domain: document.domain,
										port: location.port ? ':' + location.port : ''
										}));
										},
										
										getHeader: function(name) {
										try {
										return this.transport.getResponseHeader(name) || null;
										} catch (e) { return null }
										},
										
										evalResponse: function() {
										try {
										return eval((this.transport.responseText || '').unfilterJSON());
										} catch (e) {
										this.dispatchException(e);
										}
										},
										
										dispatchException: function(exception) {
										(this.options.onException || Prototype.emptyFunction)(this, exception);
										Ajax.Responders.dispatch('onException', this, exception);
										}
										});
										
										Ajax.Request.Events =
										['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
										
										Ajax.Response = Class.create({
										initialize: function(request){
										this.request = request;
										var transport  = this.transport  = request.transport,
										readyState = this.readyState = transport.readyState;
										
										if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
										this.status       = this.getStatus();
										this.statusText   = this.getStatusText();
										this.responseText = String.interpret(transport.responseText);
										this.headerJSON   = this._getHeaderJSON();
										}
										
										if(readyState == 4) {
										var xml = transport.responseXML;
										this.responseXML  = Object.isUndefined(xml) ? null : xml;
										this.responseJSON = this._getResponseJSON();
										}
										},
										
										status:      0,
										statusText: '',
										
										getStatus: Ajax.Request.prototype.getStatus,
										
										getStatusText: function() {
										try {
										return this.transport.statusText || '';
										} catch (e) { return '' }
										},
										
										getHeader: Ajax.Request.prototype.getHeader,
										
										getAllHeaders: function() {
										try {
										return this.getAllResponseHeaders();
										} catch (e) { return null }
										},
										
										getResponseHeader: function(name) {
										return this.transport.getResponseHeader(name);
										},
										
										getAllResponseHeaders: function() {
										return this.transport.getAllResponseHeaders();
										},
										
										_getHeaderJSON: function() {
										var json = this.getHeader('X-JSON');
										if (!json) return null;
										json = decodeURIComponent(escape(json));
										try {
										return json.evalJSON(this.request.options.sanitizeJSON ||
										!this.request.isSameOrigin());
										} catch (e) {
										this.request.dispatchException(e);
										}
										},
										
										_getResponseJSON: function() {
										var options = this.request.options;
										if (!options.evalJSON || (options.evalJSON != 'force' &&
										!(this.getHeader('Content-type') || '').include('application/json')) ||
										this.responseText.blank())
										return null;
										try {
										return this.responseText.evalJSON(options.sanitizeJSON ||
										!this.request.isSameOrigin());
										} catch (e) {
										this.request.dispatchException(e);
										}
										}
										});
										
										Ajax.Updater = Class.create(Ajax.Request, {
										initialize: function($super, container, url, options) {
										this.container = {
										success: (container.success || container),
										failure: (container.failure || (container.success ? null : container))
										};
										
										options = Object.clone(options);
										var onComplete = options.onComplete;
										options.onComplete = (function(response, json) {
										this.updateContent(response.responseText);
										if (Object.isFunction(onComplete)) onComplete(response, json);
										}).bind(this);
										
										$super(url, options);
										},
										
										updateContent: function(responseText) {
										var receiver = this.container[this.success() ? 'success' : 'failure'],
										options = this.options;
										
										if (!options.evalScripts) responseText = responseText.stripScripts();
										
										if (receiver = $(receiver)) {
										if (options.insertion) {
										if (Object.isString(options.insertion)) {
										var insertion = { }; insertion[options.insertion] = responseText;
										receiver.insert(insertion);
										}
										else options.insertion(receiver, responseText);
										}
										else receiver.update(responseText);
										}
										}
										});
										
										Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
										initialize: function($super, container, url, options) {
										$super(options);
										this.onComplete = this.options.onComplete;
										
										this.frequency = (this.options.frequency || 2);
										this.decay = (this.options.decay || 1);
										
										this.updater = { };
										this.container = container;
										this.url = url;
										
										this.start();
										},
										
										start: function() {
										this.options.onComplete = this.updateComplete.bind(this);
										this.onTimerEvent();
										},
										
										stop: function() {
										this.updater.options.onComplete = undefined;
										clearTimeout(this.timer);
										(this.onComplete || Prototype.emptyFunction).apply(this, arguments);
										},
										
										updateComplete: function(response) {
										if (this.options.decay) {
										this.decay = (response.responseText == this.lastText ?
										this.decay * this.options.decay : 1);
										
										this.lastText = response.responseText;
										}
										this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
										},
										
										onTimerEvent: function() {
										this.updater = new Ajax.Updater(this.container, this.url, this.options);
										}
										});
										function $(element) {
										if (arguments.length > 1) {
										for (var i = 0, elements = [], length = arguments.length; i < length; i++)
										elements.push($(arguments[i]));
										return elements;
										}
										if (Object.isString(element))
										element = document.getElementById(element);
										return Element.extend(element);
										}
										
										if (Prototype.BrowserFeatures.XPath) {
										document._getElementsByXPath = function(expression, parentElement) {
										var results = [];
										var query = document.evaluate(expression, $(parentElement) || document,
										null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
										for (var i = 0, length = query.snapshotLength; i < length; i++)
										results.push(Element.extend(query.snapshotItem(i)));
										return results;
										};
										}
										
										/*--------------------------------------------------------------------------*/
										
										if (!window.Node) var Node = { };
										
										if (!Node.ELEMENT_NODE) {
										// DOM level 2 ECMAScript Language Binding
										Object.extend(Node, {
										ELEMENT_NODE: 1,
										ATTRIBUTE_NODE: 2,
										TEXT_NODE: 3,
										CDATA_SECTION_NODE: 4,
										ENTITY_REFERENCE_NODE: 5,
										ENTITY_NODE: 6,
										PROCESSING_INSTRUCTION_NODE: 7,
										COMMENT_NODE: 8,
										DOCUMENT_NODE: 9,
										DOCUMENT_TYPE_NODE: 10,
										DOCUMENT_FRAGMENT_NODE: 11,
										NOTATION_NODE: 12
										});
										}
										
										(function() {
										var element = this.Element;
										this.Element = function(tagName, attributes) {
										attributes = attributes || { };
										tagName = tagName.toLowerCase();
										var cache = Element.cache;
										if (Prototype.Browser.IE && attributes.name) {
										tagName = '<' + tagName + ' name="' + attributes.name + '">';
										delete attributes.name;
										return Element.writeAttribute(document.createElement(tagName), attributes);
										}
										if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
										return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
										};
										Object.extend(this.Element, element || { });
										}).call(window);
										
										Element.cache = { };
										
										Element.Methods = {
										visible: function(element) {
										return $(element).style.display != 'none';
										},
										
										toggle: function(element) {
										element = $(element);
										Element[Element.visible(element) ? 'hide' : 'show'](element);
										return element;
										},
										
										hide: function(element) {
										$(element).style.display = 'none';
										return element;
										},
										
										show: function(element) {
										$(element).style.display = '';
										return element;
										},
										
										remove: function(element) {
										element = $(element);
										element.parentNode.removeChild(element);
										return element;
										},
										
										update: function(element, content) {
										element = $(element);
										if (content && content.toElement) content = content.toElement();
										if (Object.isElement(content)) return element.update().insert(content);
										content = Object.toHTML(content);
										element.innerHTML = content.stripScripts();
										content.evalScripts.bind(content).defer();
										return element;
										},
										
										replace: function(element, content) {
										element = $(element);
										if (content && content.toElement) content = content.toElement();
										else if (!Object.isElement(content)) {
										content = Object.toHTML(content);
										var range = element.ownerDocument.createRange();
										range.selectNode(element);
										content.evalScripts.bind(content).defer();
										content = range.createContextualFragment(content.stripScripts());
										}
										element.parentNode.replaceChild(content, element);
										return element;
										},
										
										insert: function(element, insertions) {
										element = $(element);
										
										if (Object.isString(insertions) || Object.isNumber(insertions) ||
										Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
										insertions = {bottom:insertions};
										
										var content, insert, tagName, childNodes;
										
										for (var position in insertions) {
										content  = insertions[position];
										position = position.toLowerCase();
										insert = Element._insertionTranslations[position];
										
										if (content && content.toElement) content = content.toElement();
										if (Object.isElement(content)) {
										insert(element, content);
										continue;
										}
										
										content = Object.toHTML(content);
										
										tagName = ((position == 'before' || position == 'after')
										? element.parentNode : element).tagName.toUpperCase();
										
										childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
										
										if (position == 'top' || position == 'after') childNodes.reverse();
										childNodes.each(insert.curry(element));
										
										content.evalScripts.bind(content).defer();
										}
										
										return element;
										},
										
										wrap: function(element, wrapper, attributes) {
										element = $(element);
										if (Object.isElement(wrapper))
										$(wrapper).writeAttribute(attributes || { });
										else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
										else wrapper = new Element('div', wrapper);
										if (element.parentNode)
										element.parentNode.replaceChild(wrapper, element);
										wrapper.appendChild(element);
										return wrapper;
										},
										
										inspect: function(element) {
										element = $(element);
										var result = '<' + element.tagName.toLowerCase();
										$H({'id': 'id', 'className': 'class'}).each(function(pair) {
										var property = pair.first(), attribute = pair.last();
										var value = (element[property] || '').toString();
										if (value) result += ' ' + attribute + '=' + value.inspect(true);
										});
										return result + '>';
										},
										
										recursivelyCollect: function(element, property) {
										element = $(element);
										var elements = [];
										while (element = element[property])
										if (element.nodeType == 1)
										elements.push(Element.extend(element));
										return elements;
										},
										
										ancestors: function(element) {
										return $(element).recursivelyCollect('parentNode');
										},
										
										descendants: function(element) {
										return $(element).select("*");
										},
										
										firstDescendant: function(element) {
										element = $(element).firstChild;
										while (element && element.nodeType != 1) element = element.nextSibling;
										return $(element);
										},
										
										immediateDescendants: function(element) {
										if (!(element = $(element).firstChild)) return [];
										while (element && element.nodeType != 1) element = element.nextSibling;
										if (element) return [element].concat($(element).nextSiblings());
										return [];
										},
										
										previousSiblings: function(element) {
										return $(element).recursivelyCollect('previousSibling');
										},
										
										nextSiblings: function(element) {
										return $(element).recursivelyCollect('nextSibling');
										},
										
										siblings: function(element) {
										element = $(element);
										return element.previousSiblings().reverse().concat(element.nextSiblings());
										},
										
										match: function(element, selector) {
										if (Object.isString(selector))
										selector = new Selector(selector);
										return selector.match($(element));
										},
										
										up: function(element, expression, index) {
										element = $(element);
										if (arguments.length == 1) return $(element.parentNode);
										var ancestors = element.ancestors();
										return Object.isNumber(expression) ? ancestors[expression] :
										Selector.findElement(ancestors, expression, index);
										},
										
										down: function(element, expression, index) {
										element = $(element);
										if (arguments.length == 1) return element.firstDescendant();
										return Object.isNumber(expression) ? element.descendants()[expression] :
										element.select(expression)[index || 0];
										},
										
										previous: function(element, expression, index) {
										element = $(element);
										if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
										var previousSiblings = element.previousSiblings();
										return Object.isNumber(expression) ? previousSiblings[expression] :
										Selector.findElement(previousSiblings, expression, index);
										},
										
										next: function(element, expression, index) {
										element = $(element);
										if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
										var nextSiblings = element.nextSiblings();
										return Object.isNumber(expression) ? nextSiblings[expression] :
										Selector.findElement(nextSiblings, expression, index);
										},
										
										select: function() {
										var args = $A(arguments), element = $(args.shift());
										return Selector.findChildElements(element, args);
										},
										
										adjacent: function() {
										var args = $A(arguments), element = $(args.shift());
										return Selector.findChildElements(element.parentNode, args).without(element);
										},
										
										identify: function(element) {
										element = $(element);
										var id = element.readAttribute('id'), self = arguments.callee;
										if (id) return id;
										do { id = 'anonymous_element_' + self.counter++ } while ($(id));
										element.writeAttribute('id', id);
										return id;
										},
										
										readAttribute: function(element, name) {
										element = $(element);
										if (Prototype.Browser.IE) {
										var t = Element._attributeTranslations.read;
										if (t.values[name]) return t.values[name](element, name);
										if (t.names[name]) name = t.names[name];
										if (name.include(':')) {
										return (!element.attributes || !element.attributes[name]) ? null :
										element.attributes[name].value;
										}
										}
										return element.getAttribute(name);
										},
										
										writeAttribute: function(element, name, value) {
										element = $(element);
										var attributes = { }, t = Element._attributeTranslations.write;
										
										if (typeof name == 'object') attributes = name;
										else attributes[name] = Object.isUndefined(value) ? true : value;
										
										for (var attr in attributes) {
										name = t.names[attr] || attr;
										value = attributes[attr];
										if (t.values[attr]) name = t.values[attr](element, value);
										if (value === false || value === null)
										element.removeAttribute(name);
										else if (value === true)
										element.setAttribute(name, name);
										else element.setAttribute(name, value);
										}
										return element;
										},
										
										getHeight: function(element) {
										return $(element).getDimensions().height;
										},
										
										getWidth: function(element) {
										return $(element).getDimensions().width;
										},
										
										classNames: function(element) {
										return new Element.ClassNames(element);
										},
										
										hasClassName: function(element, className) {
										if (!(element = $(element))) return;
										var elementClassName = element.className;
										return (elementClassName.length > 0 && (elementClassName == className ||
										new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
										},
										
										addClassName: function(element, className) {
										if (!(element = $(element))) return;
										if (!element.hasClassName(className))
										element.className += (element.className ? ' ' : '') + className;
										return element;
										},
										
										removeClassName: function(element, className) {
										if (!(element = $(element))) return;
										element.className = element.className.replace(
										new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
										return element;
										},
										
										toggleClassName: function(element, className) {
										if (!(element = $(element))) return;
										return element[element.hasClassName(className) ?
										'removeClassName' : 'addClassName'](className);
										},
										
										// removes whitespace-only text node children
										cleanWhitespace: function(element) {
										element = $(element);
										var node = element.firstChild;
										while (node) {
										var nextNode = node.nextSibling;
										if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
										element.removeChild(node);
										node = nextNode;
										}
										return element;
										},
										
										empty: function(element) {
										return $(element).innerHTML.blank();
										},
										
										descendantOf: function(element, ancestor) {
										element = $(element), ancestor = $(ancestor);
										var originalAncestor = ancestor;
										
										if (element.compareDocumentPosition)
										return (element.compareDocumentPosition(ancestor) & 8) === 8;
										
										if (element.sourceIndex && !Prototype.Browser.Opera) {
										var e = element.sourceIndex, a = ancestor.sourceIndex,
										nextAncestor = ancestor.nextSibling;
										if (!nextAncestor) {
										do { ancestor = ancestor.parentNode; }
										while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
										}
										if (nextAncestor && nextAncestor.sourceIndex)
										return (e > a && e < nextAncestor.sourceIndex);
										}
										
										while (element = element.parentNode)
										if (element == originalAncestor) return true;
										return false;
										},
										
										scrollTo: function(element) {
										element = $(element);
										var pos = element.cumulativeOffset();
										window.scrollTo(pos[0], pos[1]);
										return element;
										},
										
										getStyle: function(element, style) {
										element = $(element);
										style = style == 'float' ? 'cssFloat' : style.camelize();
										var value = element.style[style];
										if (!value) {
										var css = document.defaultView.getComputedStyle(element, null);
										value = css ? css[style] : null;
										}
										if (style == 'opacity') return value ? parseFloat(value) : 1.0;
										return value == 'auto' ? null : value;
										},
										
										getOpacity: function(element) {
										return $(element).getStyle('opacity');
										},
										
										setStyle: function(element, styles) {
										element = $(element);
										var elementStyle = element.style, match;
										if (Object.isString(styles)) {
										element.style.cssText += ';' + styles;
										return styles.include('opacity') ?
										element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
										}
										for (var property in styles)
										if (property == 'opacity') element.setOpacity(styles[property]);
										else
										elementStyle[(property == 'float' || property == 'cssFloat') ?
										(Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
										property] = styles[property];
										
										return element;
										},
										
										setOpacity: function(element, value) {
										element = $(element);
										element.style.opacity = (value == 1 || value === '') ? '' :
										(value < 0.00001) ? 0 : value;
										return element;
										},
										
										getDimensions: function(element) {
										element = $(element);
										var display = $(element).getStyle('display');
										if (display != 'none' && display != null) // Safari bug
										return {width: element.offsetWidth, height: element.offsetHeight};
										
										// All *Width and *Height properties give 0 on elements with display none,
										// so enable the element temporarily
										var els = element.style;
										var originalVisibility = els.visibility;
										var originalPosition = els.position;
										var originalDisplay = els.display;
										els.visibility = 'hidden';
										els.position = 'absolute';
										els.display = 'block';
										var originalWidth = element.clientWidth;
										var originalHeight = element.clientHeight;
										els.display = originalDisplay;
										els.position = originalPosition;
										els.visibility = originalVisibility;
										return {width: originalWidth, height: originalHeight};
										},
										
										makePositioned: function(element) {
										element = $(element);
										var pos = Element.getStyle(element, 'position');
										if (pos == 'static' || !pos) {
										element._madePositioned = true;
										element.style.position = 'relative';
										// Opera returns the offset relative to the positioning context, when an
										// element is position relative but top and left have not been defined
										if (window.opera) {
										element.style.top = 0;
										element.style.left = 0;
										}
										}
										return element;
										},
										
										undoPositioned: function(element) {
										element = $(element);
										if (element._madePositioned) {
										element._madePositioned = undefined;
										element.style.position =
										element.style.top =
										element.style.left =
										element.style.bottom =
										element.style.right = '';
										}
										return element;
										},
										
										makeClipping: function(element) {
										element = $(element);
										if (element._overflow) return element;
										element._overflow = Element.getStyle(element, 'overflow') || 'auto';
										if (element._overflow !== 'hidden')
										element.style.overflow = 'hidden';
										return element;
										},
										
										undoClipping: function(element) {
										element = $(element);
										if (!element._overflow) return element;
										element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
										element._overflow = null;
										return element;
										},
										
										cumulativeOffset: function(element) {
										var valueT = 0, valueL = 0;
										do {
										valueT += element.offsetTop  || 0;
										valueL += element.offsetLeft || 0;
										element = element.offsetParent;
										} while (element);
										return Element._returnOffset(valueL, valueT);
										},
										
										positionedOffset: function(element) {
										var valueT = 0, valueL = 0;
										do {
										valueT += element.offsetTop  || 0;
										valueL += element.offsetLeft || 0;
										element = element.offsetParent;
										if (element) {
										if (element.tagName == 'BODY') break;
										var p = Element.getStyle(element, 'position');
										if (p !== 'static') break;
										}
										} while (element);
										return Element._returnOffset(valueL, valueT);
										},
										
										absolutize: function(element) {
										element = $(element);
										if (element.getStyle('position') == 'absolute') return;
										// Position.prepare(); // To be done manually by Scripty when it needs it.
										
										var offsets = element.positionedOffset();
										var top     = offsets[1];
										var left    = offsets[0];
										var width   = element.clientWidth;
										var height  = element.clientHeight;
										
										element._originalLeft   = left - parseFloat(element.style.left  || 0);
										element._originalTop    = top  - parseFloat(element.style.top || 0);
										element._originalWidth  = element.style.width;
										element._originalHeight = element.style.height;
										
										element.style.position = 'absolute';
										element.style.top    = top + 'px';
										element.style.left   = left + 'px';
										element.style.width  = width + 'px';
										element.style.height = height + 'px';
										return element;
										},
										
										relativize: function(element) {
										element = $(element);
										if (element.getStyle('position') == 'relative') return;
										// Position.prepare(); // To be done manually by Scripty when it needs it.
										
										element.style.position = 'relative';
										var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
										var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
										
										element.style.top    = top + 'px';
										element.style.left   = left + 'px';
										element.style.height = element._originalHeight;
										element.style.width  = element._originalWidth;
										return element;
										},
										
										cumulativeScrollOffset: function(element) {
										var valueT = 0, valueL = 0;
										do {
										valueT += element.scrollTop  || 0;
										valueL += element.scrollLeft || 0;
										element = element.parentNode;
										} while (element);
										return Element._returnOffset(valueL, valueT);
										},
										
										getOffsetParent: function(element) {
										if (element.offsetParent) return $(element.offsetParent);
										if (element == document.body) return $(element);
										
										while ((element = element.parentNode) && element != document.body)
										if (Element.getStyle(element, 'position') != 'static')
										return $(element);
										
										return $(document.body);
										},
										
										viewportOffset: function(forElement) {
										var valueT = 0, valueL = 0;
										
										var element = forElement;
										do {
										valueT += element.offsetTop  || 0;
										valueL += element.offsetLeft || 0;
										
										// Safari fix
										if (element.offsetParent == document.body &&
										Element.getStyle(element, 'position') == 'absolute') break;
										
										} while (element = element.offsetParent);
										
										element = forElement;
										do {
										if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
										valueT -= element.scrollTop  || 0;
										valueL -= element.scrollLeft || 0;
										}
										} while (element = element.parentNode);
										
										return Element._returnOffset(valueL, valueT);
										},
										
										clonePosition: function(element, source) {
										var options = Object.extend({
										setLeft:    true,
										setTop:     true,
										setWidth:   true,
										setHeight:  true,
										offsetTop:  0,
										offsetLeft: 0
										}, arguments[2] || { });
										
										// find page position of source
										source = $(source);
										var p = source.viewportOffset();
										
										// find coordinate system to use
										element = $(element);
										var delta = [0, 0];
										var parent = null;
										// delta [0,0] will do fine with position: fixed elements,
										// position:absolute needs offsetParent deltas
										if (Element.getStyle(element, 'position') == 'absolute') {
										parent = element.getOffsetParent();
										delta = parent.viewportOffset();
										}
										
										// correct by body offsets (fixes Safari)
										if (parent == document.body) {
										delta[0] -= document.body.offsetLeft;
										delta[1] -= document.body.offsetTop;
										}
										
										// set position
										if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
										if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
										if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
										if (options.setHeight) element.style.height = source.offsetHeight + 'px';
										return element;
										}
										};
										
										Element.Methods.identify.counter = 1;
										
										Object.extend(Element.Methods, {
										getElementsBySelector: Element.Methods.select,
										childElements: Element.Methods.immediateDescendants
										});
										
										Element._attributeTranslations = {
										write: {
										names: {
										className: 'class',
										htmlFor:   'for'
										},
										values: { }
										}
										};
										
										if (Prototype.Browser.Opera) {
										Element.Methods.getStyle = Element.Methods.getStyle.wrap(
										function(proceed, element, style) {
										switch (style) {
										case 'left': case 'top': case 'right': case 'bottom':
										if (proceed(element, 'position') === 'static') return null;
										case 'height': case 'width':
										// returns '0px' for hidden elements; we want it to return null
										if (!Element.visible(element)) return null;
										
										// returns the border-box dimensions rather than the content-box
										// dimensions, so we subtract padding and borders from the value
										var dim = parseInt(proceed(element, style), 10);
										
										if (dim !== element['offset' + style.capitalize()])
										return dim + 'px';
										
										var properties;
										if (style === 'height') {
										properties = ['border-top-width', 'padding-top',
										'padding-bottom', 'border-bottom-width'];
										}
										else {
										properties = ['border-left-width', 'padding-left',
										'padding-right', 'border-right-width'];
										}
										return properties.inject(dim, function(memo, property) {
										var val = proceed(element, property);
										return val === null ? memo : memo - parseInt(val, 10);
										}) + 'px';
										default: return proceed(element, style);
										}
										}
										);
										
										Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
										function(proceed, element, attribute) {
										if (attribute === 'title') return element.title;
										return proceed(element, attribute);
										}
										);
										}
										
										else if (Prototype.Browser.IE) {
										// IE doesn't report offsets correctly for static elements, so we change them
										// to "relative" to get the values, then change them back.
										Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
										function(proceed, element) {
										element = $(element);
										var position = element.getStyle('position');
										if (position !== 'static') return proceed(element);
										element.setStyle({ position: 'relative' });
										var value = proceed(element);
										element.setStyle({ position: position });
										return value;
										}
										);
										
										$w('positionedOffset viewportOffset').each(function(method) {
										Element.Methods[method] = Element.Methods[method].wrap(
										function(proceed, element) {
										element = $(element);
										var position = element.getStyle('position');
										if (position !== 'static') return proceed(element);
										// Trigger hasLayout on the offset parent so that IE6 reports
										// accurate offsetTop and offsetLeft values for position: fixed.
										var offsetParent = element.getOffsetParent();
										if (offsetParent && offsetParent.getStyle('position') === 'fixed')
										offsetParent.setStyle({ zoom: 1 });
										element.setStyle({ position: 'relative' });
										var value = proceed(element);
										element.setStyle({ position: position });
										return value;
										}
										);
										});
										
										Element.Methods.getStyle = function(element, style) {
										element = $(element);
										style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
										var value = element.style[style];
										if (!value && element.currentStyle) value = element.currentStyle[style];
										
										if (style == 'opacity') {
										if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
										if (value[1]) return parseFloat(value[1]) / 100;
										return 1.0;
										}
										
										if (value == 'auto') {
										if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
										return element['offset' + style.capitalize()] + 'px';
										return null;
										}
										return value;
										};
										
										Element.Methods.setOpacity = function(element, value) {
										function stripAlpha(filter){
										return filter.replace(/alpha\([^\)]*\)/gi,'');
										}
										element = $(element);
										var currentStyle = element.currentStyle;
										if ((currentStyle && !currentStyle.hasLayout) ||
										(!currentStyle && element.style.zoom == 'normal'))
										element.style.zoom = 1;
										
										var filter = element.getStyle('filter'), style = element.style;
										if (value == 1 || value === '') {
										(filter = stripAlpha(filter)) ?
										style.filter = filter : style.removeAttribute('filter');
										return element;
										} else if (value < 0.00001) value = 0;
										style.filter = stripAlpha(filter) +
										'alpha(opacity=' + (value * 100) + ')';
										return element;
										};
										
										Element._attributeTranslations = {
										read: {
										names: {
										'class': 'className',
										'for':   'htmlFor'
										},
										values: {
										_getAttr: function(element, attribute) {
										return element.getAttribute(attribute, 2);
										},
										_getAttrNode: function(element, attribute) {
										var node = element.getAttributeNode(attribute);
										return node ? node.value : "";
										},
										_getEv: function(element, attribute) {
										attribute = element.getAttribute(attribute);
										return attribute ? attribute.toString().slice(23, -2) : null;
										},
										_flag: function(element, attribute) {
										return $(element).hasAttribute(attribute) ? attribute : null;
										},
										style: function(element) {
										return element.style.cssText.toLowerCase();
										},
										title: function(element) {
										return element.title;
										}
										}
										}
										};
										
										Element._attributeTranslations.write = {
										names: Object.extend({
										cellpadding: 'cellPadding',
										cellspacing: 'cellSpacing'
										}, Element._attributeTranslations.read.names),
										values: {
										checked: function(element, value) {
										element.checked = !!value;
										},
										
										style: function(element, value) {
										element.style.cssText = value ? value : '';
										}
										}
										};
										
										Element._attributeTranslations.has = {};
										
										$w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
										'encType maxLength readOnly longDesc').each(function(attr) {
										Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
										Element._attributeTranslations.has[attr.toLowerCase()] = attr;
										});
										
										(function(v) {
										Object.extend(v, {
										href:        v._getAttr,
										src:         v._getAttr,
										type:        v._getAttr,
										action:      v._getAttrNode,
										disabled:    v._flag,
										checked:     v._flag,
										readonly:    v._flag,
										multiple:    v._flag,
										onload:      v._getEv,
										onunload:    v._getEv,
										onclick:     v._getEv,
										ondblclick:  v._getEv,
										onmousedown: v._getEv,
										onmouseup:   v._getEv,
										onmouseover: v._getEv,
										onmousemove: v._getEv,
										onmouseout:  v._getEv,
										onfocus:     v._getEv,
										onblur:      v._getEv,
										onkeypress:  v._getEv,
										onkeydown:   v._getEv,
										onkeyup:     v._getEv,
										onsubmit:    v._getEv,
										onreset:     v._getEv,
										onselect:    v._getEv,
										onchange:    v._getEv
										});
										})(Element._attributeTranslations.read.values);
										}
										
										else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
										Element.Methods.setOpacity = function(element, value) {
										element = $(element);
										element.style.opacity = (value == 1) ? 0.999999 :
										(value === '') ? '' : (value < 0.00001) ? 0 : value;
										return element;
										};
										}
										
										else if (Prototype.Browser.WebKit) {
										Element.Methods.setOpacity = function(element, value) {
										element = $(element);
										element.style.opacity = (value == 1 || value === '') ? '' :
										(value < 0.00001) ? 0 : value;
										
										if (value == 1)
										if(element.tagName == 'IMG' && element.width) {
										element.width++; element.width--;
										} else try {
										var n = document.createTextNode(' ');
										element.appendChild(n);
										element.removeChild(n);
										} catch (e) { }
										
										return element;
										};
										
										// Safari returns margins on body which is incorrect if the child is absolutely
										// positioned.  For performance reasons, redefine Element#cumulativeOffset for
										// KHTML/WebKit only.
										Element.Methods.cumulativeOffset = function(element) {
										var valueT = 0, valueL = 0;
										do {
										valueT += element.offsetTop  || 0;
										valueL += element.offsetLeft || 0;
										if (element.offsetParent == document.body)
										if (Element.getStyle(element, 'position') == 'absolute') break;
										
										element = element.offsetParent;
										} while (element);
										
										return Element._returnOffset(valueL, valueT);
										};
										}
										
										if (Prototype.Browser.IE || Prototype.Browser.Opera) {
										// IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
										Element.Methods.update = function(element, content) {
										element = $(element);
										
										if (content && content.toElement) content = content.toElement();
										if (Object.isElement(content)) return element.update().insert(content);
										
										content = Object.toHTML(content);
										var tagName = element.tagName.toUpperCase();
										
										if (tagName in Element._insertionTranslations.tags) {
										$A(element.childNodes).each(function(node) { element.removeChild(node) });
										Element._getContentFromAnonymousElement(tagName, content.stripScripts())
										.each(function(node) { element.appendChild(node) });
										}
										else element.innerHTML = content.stripScripts();
										
										content.evalScripts.bind(content).defer();
										return element;
										};
										}
										
										if ('outerHTML' in document.createElement('div')) {
										Element.Methods.replace = function(element, content) {
										element = $(element);
										
										if (content && content.toElement) content = content.toElement();
										if (Object.isElement(content)) {
										element.parentNode.replaceChild(content, element);
										return element;
										}
										
										content = Object.toHTML(content);
										var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
										
										if (Element._insertionTranslations.tags[tagName]) {
										var nextSibling = element.next();
										var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
										parent.removeChild(element);
										if (nextSibling)
										fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
										else
										fragments.each(function(node) { parent.appendChild(node) });
										}
										else element.outerHTML = content.stripScripts();
										
										content.evalScripts.bind(content).defer();
										return element;
										};
										}
										
										Element._returnOffset = function(l, t) {
										var result = [l, t];
										result.left = l;
										result.top = t;
										return result;
										};
										
										Element._getContentFromAnonymousElement = function(tagName, html) {
										var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
										if (t) {
										div.innerHTML = t[0] + html + t[1];
										t[2].times(function() { div = div.firstChild });
										} else div.innerHTML = html;
										return $A(div.childNodes);
										};
										
										Element._insertionTranslations = {
										before: function(element, node) {
										element.parentNode.insertBefore(node, element);
										},
										top: function(element, node) {
										element.insertBefore(node, element.firstChild);
										},
										bottom: function(element, node) {
										element.appendChild(node);
										},
										after: function(element, node) {
										element.parentNode.insertBefore(node, element.nextSibling);
										},
										tags: {
										TABLE:  ['<table>',                '</table>',                   1],
										TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
										TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
										TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
										SELECT: ['<select>',               '</select>',                  1]
										}
										};
										
										(function() {
										Object.extend(this.tags, {
										THEAD: this.tags.TBODY,
										TFOOT: this.tags.TBODY,
										TH:    this.tags.TD
										});
										}).call(Element._insertionTranslations);
										
										Element.Methods.Simulated = {
										hasAttribute: function(element, attribute) {
										attribute = Element._attributeTranslations.has[attribute] || attribute;
										var node = $(element).getAttributeNode(attribute);
										return node && node.specified;
										}
										};
										
										Element.Methods.ByTag = { };
										
										Object.extend(Element, Element.Methods);
										
										if (!Prototype.BrowserFeatures.ElementExtensions &&
										document.createElement('div').__proto__) {
										window.HTMLElement = { };
										window.HTMLElement.prototype = document.createElement('div').__proto__;
										Prototype.BrowserFeatures.ElementExtensions = true;
										}
										
										Element.extend = (function() {
										if (Prototype.BrowserFeatures.SpecificElementExtensions)
										return Prototype.K;
										
										var Methods = { }, ByTag = Element.Methods.ByTag;
										
										var extend = Object.extend(function(element) {
										if (!element || element._extendedByPrototype ||
										element.nodeType != 1 || element == window) return element;
										
										var methods = Object.clone(Methods),
										tagName = element.tagName, property, value;
										
										// extend methods for specific tags
										if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
										
										for (property in methods) {
										value = methods[property];
										if (Object.isFunction(value) && !(property in element))
										element[property] = value.methodize();
										}
										
										element._extendedByPrototype = Prototype.emptyFunction;
										return element;
										
										}, {
										refresh: function() {
										// extend methods for all tags (Safari doesn't need this)
										if (!Prototype.BrowserFeatures.ElementExtensions) {
										Object.extend(Methods, Element.Methods);
										Object.extend(Methods, Element.Methods.Simulated);
										}
										}
										});
										
										extend.refresh();
										return extend;
										})();
										
										Element.hasAttribute = function(element, attribute) {
										if (element.hasAttribute) return element.hasAttribute(attribute);
										return Element.Methods.Simulated.hasAttribute(element, attribute);
										};
										
										Element.addMethods = function(methods) {
										var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
										
										if (!methods) {
										Object.extend(Form, Form.Methods);
										Object.extend(Form.Element, Form.Element.Methods);
										Object.extend(Element.Methods.ByTag, {
										"FORM":     Object.clone(Form.Methods),
										"INPUT":    Object.clone(Form.Element.Methods),
										"SELECT":   Object.clone(Form.Element.Methods),
										"TEXTAREA": Object.clone(Form.Element.Methods)
										});
										}
										
										if (arguments.length == 2) {
										var tagName = methods;
										methods = arguments[1];
										}
										
										if (!tagName) Object.extend(Element.Methods, methods || { });
										else {
										if (Object.isArray(tagName)) tagName.each(extend);
										else extend(tagName);
										}
										
										function extend(tagName) {
										tagName = tagName.toUpperCase();
										if (!Element.Methods.ByTag[tagName])
										Element.Methods.ByTag[tagName] = { };
										Object.extend(Element.Methods.ByTag[tagName], methods);
										}
										
										function copy(methods, destination, onlyIfAbsent) {
										onlyIfAbsent = onlyIfAbsent || false;
										for (var property in methods) {
										var value = methods[property];
										if (!Object.isFunction(value)) continue;
										if (!onlyIfAbsent || !(property in destination))
										destination[property] = value.methodize();
										}
										}
										
										function findDOMClass(tagName) {
										var klass;
										var trans = {
										"OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
										"FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
										"DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
										"H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
										"INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
										"TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
										"TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
										"TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
										"FrameSet", "IFRAME": "IFrame"
										};
										if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
										if (window[klass]) return window[klass];
										klass = 'HTML' + tagName + 'Element';
										if (window[klass]) return window[klass];
										klass = 'HTML' + tagName.capitalize() + 'Element';
										if (window[klass]) return window[klass];
										
										window[klass] = { };
										window[klass].prototype = document.createElement(tagName).__proto__;
										return window[klass];
										}
										
										if (F.ElementExtensions) {
										copy(Element.Methods, HTMLElement.prototype);
										copy(Element.Methods.Simulated, HTMLElement.prototype, true);
										}
										
										if (F.SpecificElementExtensions) {
										for (var tag in Element.Methods.ByTag) {
										var klass = findDOMClass(tag);
										if (Object.isUndefined(klass)) continue;
										copy(T[tag], klass.prototype);
										}
										}
										
										Object.extend(Element, Element.Methods);
										delete Element.ByTag;
										
										if (Element.extend.refresh) Element.extend.refresh();
										Element.cache = { };
										};
										
										document.viewport = {
										getDimensions: function() {
										var dimensions = { };
										var B = Prototype.Browser;
										$w('width height').each(function(d) {
										var D = d.capitalize();
										dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
										(B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
										});
										return dimensions;
										},
										
										getWidth: function() {
										return this.getDimensions().width;
										},
										
										getHeight: function() {
										return this.getDimensions().height;
										},
										
										getScrollOffsets: function() {
										return Element._returnOffset(
										window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
										window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
										}
										};
										/* Portions of the Selector class are derived from Jack Slocum’s DomQuery,
										* part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
										* license.  Please see http://www.yui-ext.com/ for more information. */
										
										var Selector = Class.create({
										initialize: function(expression) {
										this.expression = expression.strip();
										this.compileMatcher();
										},
										
										shouldUseXPath: function() {
										if (!Prototype.BrowserFeatures.XPath) return false;
										
										var e = this.expression;
										
										// Safari 3 chokes on :*-of-type and :empty
										if (Prototype.Browser.WebKit &&
										(e.include("-of-type") || e.include(":empty")))
										return false;
										
										// XPath can't do namespaced attributes, nor can it read
										// the "checked" property from DOM nodes
										if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
										return false;
										
										return true;
										},
										
										compileMatcher: function() {
										if (this.shouldUseXPath())
										return this.compileXPathMatcher();
										
										var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
										c = Selector.criteria, le, p, m;
										
										if (Selector._cache[e]) {
										this.matcher = Selector._cache[e];
										return;
										}
										
										this.matcher = ["this.matcher = function(root) {",
										"var r = root, h = Selector.handlers, c = false, n;"];
										
										while (e && le != e && (/\S/).test(e)) {
										le = e;
										for (var i in ps) {
										p = ps[i];
										if (m = e.match(p)) {
										this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
										new Template(c[i]).evaluate(m));
										e = e.replace(m[0], '');
										break;
										}
										}
										}
										
										this.matcher.push("return h.unique(n);\n}");
										eval(this.matcher.join('\n'));
										Selector._cache[this.expression] = this.matcher;
										},
										
										compileXPathMatcher: function() {
										var e = this.expression, ps = Selector.patterns,
										x = Selector.xpath, le, m;
										
										if (Selector._cache[e]) {
										this.xpath = Selector._cache[e]; return;
										}
										
										this.matcher = ['.//*'];
										while (e && le != e && (/\S/).test(e)) {
										le = e;
										for (var i in ps) {
										if (m = e.match(ps[i])) {
										this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
										new Template(x[i]).evaluate(m));
										e = e.replace(m[0], '');
										break;
										}
										}
										}
										
										this.xpath = this.matcher.join('');
										Selector._cache[this.expression] = this.xpath;
										},
										
										findElements: function(root) {
										root = root || document;
										if (this.xpath) return document._getElementsByXPath(this.xpath, root);
										return this.matcher(root);
										},
										
										match: function(element) {
										this.tokens = [];
										
										var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
										var le, p, m;
										
										while (e && le !== e && (/\S/).test(e)) {
										le = e;
										for (var i in ps) {
										p = ps[i];
										if (m = e.match(p)) {
										// use the Selector.assertions methods unless the selector
										// is too complex.
										if (as[i]) {
										this.tokens.push([i, Object.clone(m)]);
										e = e.replace(m[0], '');
										} else {
										// reluctantly do a document-wide search
										// and look for a match in the array
										return this.findElements(document).include(element);
										}
										}
										}
										}
										
										var match = true, name, matches;
										for (var i = 0, token; token = this.tokens[i]; i++) {
										name = token[0], matches = token[1];
										if (!Selector.assertions[name](element, matches)) {
										match = false; break;
										}
										}
										
										return match;
										},
										
										toString: function() {
										return this.expression;
										},
										
										inspect: function() {
										return "#<Selector:" + this.expression.inspect() + ">";
										}
										});
										
										Object.extend(Selector, {
										_cache: { },
										
										xpath: {
										descendant:   "//*",
										child:        "/*",
										adjacent:     "/following-sibling::*[1]",
										laterSibling: '/following-sibling::*',
										tagName:      function(m) {
										if (m[1] == '*') return '';
										return "[local-name()='" + m[1].toLowerCase() +
										"' or local-name()='" + m[1].toUpperCase() + "']";
										},
										className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
										id:           "[@id='#{1}']",
										attrPresence: function(m) {
										m[1] = m[1].toLowerCase();
										return new Template("[@#{1}]").evaluate(m);
										},
										attr: function(m) {
										m[1] = m[1].toLowerCase();
										m[3] = m[5] || m[6];
										return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
										},
										pseudo: function(m) {
										var h = Selector.xpath.pseudos[m[1]];
										if (!h) return '';
										if (Object.isFunction(h)) return h(m);
										return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
										},
										operators: {
										'=':  "[@#{1}='#{3}']",
										'!=': "[@#{1}!='#{3}']",
										'^=': "[starts-with(@#{1}, '#{3}')]",
										'$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
										'*=': "[contains(@#{1}, '#{3}')]",
										'~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
										'|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
										},
										pseudos: {
										'first-child': '[not(preceding-sibling::*)]',
										'last-child':  '[not(following-sibling::*)]',
										'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
										'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
										'checked':     "[@checked]",
										'disabled':    "[@disabled]",
										'enabled':     "[not(@disabled)]",
										'not': function(m) {
										var e = m[6], p = Selector.patterns,
										x = Selector.xpath, le, v;
										
										var exclusion = [];
										while (e && le != e && (/\S/).test(e)) {
										le = e;
										for (var i in p) {
										if (m = e.match(p[i])) {
										v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
										exclusion.push("(" + v.substring(1, v.length - 1) + ")");
										e = e.replace(m[0], '');
										break;
										}
										}
										}
										return "[not(" + exclusion.join(" and ") + ")]";
										},
										'nth-child':      function(m) {
										return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
										},
										'nth-last-child': function(m) {
										return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
										},
										'nth-of-type':    function(m) {
										return Selector.xpath.pseudos.nth("position() ", m);
										},
										'nth-last-of-type': function(m) {
										return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
										},
										'first-of-type':  function(m) {
										m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
										},
										'last-of-type':   function(m) {
										m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
										},
										'only-of-type':   function(m) {
										var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
										},
										nth: function(fragment, m) {
										var mm, formula = m[6], predicate;
										if (formula == 'even') formula = '2n+0';
										if (formula == 'odd')  formula = '2n+1';
										if (mm = formula.match(/^(\d+)$/)) // digit only
										return '[' + fragment + "= " + mm[1] + ']';
										if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
										if (mm[1] == "-") mm[1] = -1;
										var a = mm[1] ? Number(mm[1]) : 1;
										var b = mm[2] ? Number(mm[2]) : 0;
										predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
										"((#{fragment} - #{b}) div #{a} >= 0)]";
										return new Template(predicate).evaluate({
										fragment: fragment, a: a, b: b });
										}
										}
										}
										},
										
										criteria: {
										tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
										className:    'n = h.className(n, r, "#{1}", c);    c = false;',
										id:           'n = h.id(n, r, "#{1}", c);           c = false;',
										attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
										attr: function(m) {
										m[3] = (m[5] || m[6]);
										return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
										},
										pseudo: function(m) {
										if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
										return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
										},
										descendant:   'c = "descendant";',
										child:        'c = "child";',
										adjacent:     'c = "adjacent";',
										laterSibling: 'c = "laterSibling";'
										},
										
										patterns: {
										// combinators must be listed first
										// (and descendant needs to be last combinator)
										laterSibling: /^\s*~\s*/,
										child:        /^\s*>\s*/,
										adjacent:     /^\s*\+\s*/,
										descendant:   /^\s/,
										
										// selectors follow
										tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
										id:           /^#([\w\-\*]+)(\b|$)/,
										className:    /^\.([\w\-\*]+)(\b|$)/,
										pseudo:
										/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
										attrPresence: /^\[([\w]+)\]/,
										attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
										},
										
										// for Selector.match and Element#match
										assertions: {
										tagName: function(element, matches) {
										return matches[1].toUpperCase() == element.tagName.toUpperCase();
										},
										
										className: function(element, matches) {
										return Element.hasClassName(element, matches[1]);
										},
										
										id: function(element, matches) {
										return element.id === matches[1];
										},
										
										attrPresence: function(element, matches) {
										return Element.hasAttribute(element, matches[1]);
										},
										
										attr: function(element, matches) {
										var nodeValue = Element.readAttribute(element, matches[1]);
										return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
										}
										},
										
										handlers: {
										// UTILITY FUNCTIONS
										// joins two collections
										concat: function(a, b) {
										for (var i = 0, node; node = b[i]; i++)
										a.push(node);
										return a;
										},
										
										// marks an array of nodes for counting
										mark: function(nodes) {
										var _true = Prototype.emptyFunction;
										for (var i = 0, node; node = nodes[i]; i++)
										node._countedByPrototype = _true;
										return nodes;
										},
										
										unmark: function(nodes) {
										for (var i = 0, node; node = nodes[i]; i++)
										node._countedByPrototype = undefined;
										return nodes;
										},
										
										// mark each child node with its position (for nth calls)
										// "ofType" flag indicates whether we're indexing for nth-of-type
										// rather than nth-child
										index: function(parentNode, reverse, ofType) {
										parentNode._countedByPrototype = Prototype.emptyFunction;
										if (reverse) {
										for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
										var node = nodes[i];
										if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
										}
										} else {
										for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
										if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
										}
										},
										
										// filters out duplicates and extends all nodes
										unique: function(nodes) {
										if (nodes.length == 0) return nodes;
										var results = [], n;
										for (var i = 0, l = nodes.length; i < l; i++)
										if (!(n = nodes[i])._countedByPrototype) {
										n._countedByPrototype = Prototype.emptyFunction;
										results.push(Element.extend(n));
										}
										return Selector.handlers.unmark(results);
										},
										
										// COMBINATOR FUNCTIONS
										descendant: function(nodes) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										h.concat(results, node.getElementsByTagName('*'));
										return results;
										},
										
										child: function(nodes) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										for (var j = 0, child; child = node.childNodes[j]; j++)
										if (child.nodeType == 1 && child.tagName != '!') results.push(child);
										}
										return results;
										},
										
										adjacent: function(nodes) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										var next = this.nextElementSibling(node);
										if (next) results.push(next);
										}
										return results;
										},
										
										laterSibling: function(nodes) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										h.concat(results, Element.nextSiblings(node));
										return results;
										},
										
										nextElementSibling: function(node) {
										while (node = node.nextSibling)
										if (node.nodeType == 1) return node;
										return null;
										},
										
										previousElementSibling: function(node) {
										while (node = node.previousSibling)
										if (node.nodeType == 1) return node;
										return null;
										},
										
										// TOKEN FUNCTIONS
										tagName: function(nodes, root, tagName, combinator) {
										var uTagName = tagName.toUpperCase();
										var results = [], h = Selector.handlers;
										if (nodes) {
										if (combinator) {
										// fastlane for ordinary descendant combinators
										if (combinator == "descendant") {
										for (var i = 0, node; node = nodes[i]; i++)
										h.concat(results, node.getElementsByTagName(tagName));
										return results;
										} else nodes = this[combinator](nodes);
										if (tagName == "*") return nodes;
										}
										for (var i = 0, node; node = nodes[i]; i++)
										if (node.tagName.toUpperCase() === uTagName) results.push(node);
										return results;
										} else return root.getElementsByTagName(tagName);
										},
										
										id: function(nodes, root, id, combinator) {
										var targetNode = $(id), h = Selector.handlers;
										if (!targetNode) return [];
										if (!nodes && root == document) return [targetNode];
										if (nodes) {
										if (combinator) {
										if (combinator == 'child') {
										for (var i = 0, node; node = nodes[i]; i++)
										if (targetNode.parentNode == node) return [targetNode];
										} else if (combinator == 'descendant') {
										for (var i = 0, node; node = nodes[i]; i++)
										if (Element.descendantOf(targetNode, node)) return [targetNode];
										} else if (combinator == 'adjacent') {
										for (var i = 0, node; node = nodes[i]; i++)
										if (Selector.handlers.previousElementSibling(targetNode) == node)
										return [targetNode];
										} else nodes = h[combinator](nodes);
										}
										for (var i = 0, node; node = nodes[i]; i++)
										if (node == targetNode) return [targetNode];
										return [];
										}
										return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
										},
										
										className: function(nodes, root, className, combinator) {
										if (nodes && combinator) nodes = this[combinator](nodes);
										return Selector.handlers.byClassName(nodes, root, className);
										},
										
										byClassName: function(nodes, root, className) {
										if (!nodes) nodes = Selector.handlers.descendant([root]);
										var needle = ' ' + className + ' ';
										for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
										nodeClassName = node.className;
										if (nodeClassName.length == 0) continue;
										if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
										results.push(node);
										}
										return results;
										},
										
										attrPresence: function(nodes, root, attr, combinator) {
										if (!nodes) nodes = root.getElementsByTagName("*");
										if (nodes && combinator) nodes = this[combinator](nodes);
										var results = [];
										for (var i = 0, node; node = nodes[i]; i++)
										if (Element.hasAttribute(node, attr)) results.push(node);
										return results;
										},
										
										attr: function(nodes, root, attr, value, operator, combinator) {
										if (!nodes) nodes = root.getElementsByTagName("*");
										if (nodes && combinator) nodes = this[combinator](nodes);
										var handler = Selector.operators[operator], results = [];
										for (var i = 0, node; node = nodes[i]; i++) {
										var nodeValue = Element.readAttribute(node, attr);
										if (nodeValue === null) continue;
										if (handler(nodeValue, value)) results.push(node);
										}
										return results;
										},
										
										pseudo: function(nodes, name, value, root, combinator) {
										if (nodes && combinator) nodes = this[combinator](nodes);
										if (!nodes) nodes = root.getElementsByTagName("*");
										return Selector.pseudos[name](nodes, value, root);
										}
										},
										
										pseudos: {
										'first-child': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										if (Selector.handlers.previousElementSibling(node)) continue;
										results.push(node);
										}
										return results;
										},
										'last-child': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										if (Selector.handlers.nextElementSibling(node)) continue;
										results.push(node);
										}
										return results;
										},
										'only-child': function(nodes, value, root) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
										results.push(node);
										return results;
										},
										'nth-child':        function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root);
										},
										'nth-last-child':   function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root, true);
										},
										'nth-of-type':      function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root, false, true);
										},
										'nth-last-of-type': function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root, true, true);
										},
										'first-of-type':    function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, "1", root, false, true);
										},
										'last-of-type':     function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, "1", root, true, true);
										},
										'only-of-type':     function(nodes, formula, root) {
										var p = Selector.pseudos;
										return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
										},
										
										// handles the an+b logic
										getIndices: function(a, b, total) {
										if (a == 0) return b > 0 ? [b] : [];
										return $R(1, total).inject([], function(memo, i) {
										if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
										return memo;
										});
										},
										
										// handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
										nth: function(nodes, formula, root, reverse, ofType) {
										if (nodes.length == 0) return [];
										if (formula == 'even') formula = '2n+0';
										if (formula == 'odd')  formula = '2n+1';
										var h = Selector.handlers, results = [], indexed = [], m;
										h.mark(nodes);
										for (var i = 0, node; node = nodes[i]; i++) {
										if (!node.parentNode._countedByPrototype) {
										h.index(node.parentNode, reverse, ofType);
										indexed.push(node.parentNode);
										}
										}
										if (formula.match(/^\d+$/)) { // just a number
										formula = Number(formula);
										for (var i = 0, node; node = nodes[i]; i++)
										if (node.nodeIndex == formula) results.push(node);
										} else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
										if (m[1] == "-") m[1] = -1;
										var a = m[1] ? Number(m[1]) : 1;
										var b = m[2] ? Number(m[2]) : 0;
										var indices = Selector.pseudos.getIndices(a, b, nodes.length);
										for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
										for (var j = 0; j < l; j++)
										if (node.nodeIndex == indices[j]) results.push(node);
										}
										}
										h.unmark(nodes);
										h.unmark(indexed);
										return results;
										},
										
										'empty': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										// IE treats comments as element nodes
										if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
										results.push(node);
										}
										return results;
										},
										
										'not': function(nodes, selector, root) {
										var h = Selector.handlers, selectorType, m;
										var exclusions = new Selector(selector).findElements(root);
										h.mark(exclusions);
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (!node._countedByPrototype) results.push(node);
										h.unmark(exclusions);
										return results;
										},
										
										'enabled': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (!node.disabled) results.push(node);
										return results;
										},
										
										'disabled': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (node.disabled) results.push(node);
										return results;
										},
										
										'checked': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (node.checked) results.push(node);
										return results;
										}
										},
										
										operators: {
										'=':  function(nv, v) { return nv == v; },
										'!=': function(nv, v) { return nv != v; },
										'^=': function(nv, v) { return nv.startsWith(v); },
										'$=': function(nv, v) { return nv.endsWith(v); },
										'*=': function(nv, v) { return nv.include(v); },
										'~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
										'|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
										},
										
										split: function(expression) {
										var expressions = [];
										expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
										expressions.push(m[1].strip());
										});
										return expressions;
										},
										
										matchElements: function(elements, expression) {
										var matches = $$(expression), h = Selector.handlers;
										h.mark(matches);
										for (var i = 0, results = [], element; element = elements[i]; i++)
										if (element._countedByPrototype) results.push(element);
										h.unmark(matches);
										return results;
										},
										
										findElement: function(elements, expression, index) {
										if (Object.isNumber(expression)) {
										index = expression; expression = false;
										}
										return Selector.matchElements(elements, expression || '*')[index || 0];
										},
										
										findChildElements: function(element, expressions) {
										expressions = Selector.split(expressions.join(','));
										var results = [], h = Selector.handlers;
										for (var i = 0, l = expressions.length, selector; i < l; i++) {
										selector = new Selector(expressions[i].strip());
										h.concat(results, selector.findElements(element));
										}
										return (l > 1) ? h.unique(results) : results;
										}
										});
										
										if (Prototype.Browser.IE) {
										Object.extend(Selector.handlers, {
										// IE returns comment nodes on getElementsByTagName("*").
										// Filter them out.
										concat: function(a, b) {
										for (var i = 0, node; node = b[i]; i++)
										if (node.tagName !== "!") a.push(node);
										return a;
										},
										
										// IE improperly serializes _countedByPrototype in (inner|outer)HTML.
										unmark: function(nodes) {
										for (var i = 0, node; node = nodes[i]; i++)
										node.removeAttribute('_countedByPrototype');
										return nodes;
										}
										});
										}
										
										function $$() {
										return Selector.findChildElements(document, $A(arguments));
										}
										var Form = {
										reset: function(form) {
										$(form).reset();
										return form;
										},
										
										serializeElements: function(elements, options) {
										if (typeof options != 'object') options = { hash: !!options };
										else if (Object.isUndefined(options.hash)) options.hash = true;
										var key, value, submitted = false, submit = options.submit;
										
										var data = elements.inject({ }, function(result, element) {
										if (!element.disabled && element.name) {
										key = element.name; value = $(element).getValue();
										if (value != null && (element.type != 'submit' || (!submitted &&
										submit !== false && (!submit || key == submit) && (submitted = true)))) {
										if (key in result) {
										// a key is already present; construct an array of values
										if (!Object.isArray(result[key])) result[key] = [result[key]];
										result[key].push(value);
										}
										else result[key] = value;
										}
										}
										return result;
										});
										
										return options.hash ? data : Object.toQueryString(data);
										}
										};
										
										Form.Methods = {
										serialize: function(form, options) {
										return Form.serializeElements(Form.getElements(form), options);
										},
										
										getElements: function(form) {
										return $A($(form).getElementsByTagName('*')).inject([],
										function(elements, child) {
										if (Form.Element.Serializers[child.tagName.toLowerCase()])
										elements.push(Element.extend(child));
										return elements;
										}
										);
										},
										
										getInputs: function(form, typeName, name) {
										form = $(form);
										var inputs = form.getElementsByTagName('input');
										
										if (!typeName && !name) return $A(inputs).map(Element.extend);
										
										for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
										var input = inputs[i];
										if ((typeName && input.type != typeName) || (name && input.name != name))
										continue;
										matchingInputs.push(Element.extend(input));
										}
										
										return matchingInputs;
										},
										
										disable: function(form) {
										form = $(form);
										Form.getElements(form).invoke('disable');
										return form;
										},
										
										enable: function(form) {
										form = $(form);
										Form.getElements(form).invoke('enable');
										return form;
										},
										
										findFirstElement: function(form) {
										var elements = $(form).getElements().findAll(function(element) {
										return 'hidden' != element.type && !element.disabled;
										});
										var firstByIndex = elements.findAll(function(element) {
										return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
										}).sortBy(function(element) { return element.tabIndex }).first();
										
										return firstByIndex ? firstByIndex : elements.find(function(element) {
										return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
										});
										},
										
										focusFirstElement: function(form) {
										form = $(form);
										form.findFirstElement().activate();
										return form;
										},
										
										request: function(form, options) {
										form = $(form), options = Object.clone(options || { });
										
										var params = options.parameters, action = form.readAttribute('action') || '';
										if (action.blank()) action = window.location.href;
										options.parameters = form.serialize(true);
										
										if (params) {
										if (Object.isString(params)) params = params.toQueryParams();
										Object.extend(options.parameters, params);
										}
										
										if (form.hasAttribute('method') && !options.method)
										options.method = form.method;
										
										return new Ajax.Request(action, options);
										}
										};
										
										/*--------------------------------------------------------------------------*/
										
										Form.Element = {
										focus: function(element) {
										$(element).focus();
										return element;
										},
										
										select: function(element) {
										$(element).select();
										return element;
										}
										};
										
										Form.Element.Methods = {
										serialize: function(element) {
										element = $(element);
										if (!element.disabled && element.name) {
										var value = element.getValue();
										if (value != undefined) {
										var pair = { };
										pair[element.name] = value;
										return Object.toQueryString(pair);
										}
										}
										return '';
										},
										
										getValue: function(element) {
										element = $(element);
										var method = element.tagName.toLowerCase();
										return Form.Element.Serializers[method](element);
										},
										
										setValue: function(element, value) {
										element = $(element);
										var method = element.tagName.toLowerCase();
										Form.Element.Serializers[method](element, value);
										return element;
										},
										
										clear: function(element) {
										$(element).value = '';
										return element;
										},
										
										present: function(element) {
										return $(element).value != '';
										},
										
										activate: function(element) {
										element = $(element);
										try {
										element.focus();
										if (element.select && (element.tagName.toLowerCase() != 'input' ||
										!['button', 'reset', 'submit'].include(element.type)))
										element.select();
										} catch (e) { }
										return element;
										},
										
										disable: function(element) {
										element = $(element);
										element.blur();
										element.disabled = true;
										return element;
										},
										
										enable: function(element) {
										element = $(element);
										element.disabled = false;
										return element;
										}
										};
										
										/*--------------------------------------------------------------------------*/
										
										var Field = Form.Element;
										var $F = Form.Element.Methods.getValue;
										
										/*--------------------------------------------------------------------------*/
										
										Form.Element.Serializers = {
										input: function(element, value) {
										switch (element.type.toLowerCase()) {
										case 'checkbox':
										case 'radio':
										return Form.Element.Serializers.inputSelector(element, value);
										default:
										return Form.Element.Serializers.textarea(element, value);
										}
										},
										
										inputSelector: function(element, value) {
										if (Object.isUndefined(value)) return element.checked ? element.value : null;
										else element.checked = !!value;
										},
										
										textarea: function(element, value) {
										if (Object.isUndefined(value)) return element.value;
										else element.value = value;
										},
										
										select: function(element, index) {
										if (Object.isUndefined(index))
										return this[element.type == 'select-one' ?
										'selectOne' : 'selectMany'](element);
										else {
										var opt, value, single = !Object.isArray(index);
										for (var i = 0, length = element.length; i < length; i++) {
										opt = element.options[i];
										value = this.optionValue(opt);
										if (single) {
										if (value == index) {
										opt.selected = true;
										return;
										}
										}
										else opt.selected = index.include(value);
										}
										}
										},
										
										selectOne: function(element) {
										var index = element.selectedIndex;
										return index >= 0 ? this.optionValue(element.options[index]) : null;
										},
										
										selectMany: function(element) {
										var values, length = element.length;
										if (!length) return null;
										
										for (var i = 0, values = []; i < length; i++) {
										var opt = element.options[i];
										if (opt.selected) values.push(this.optionValue(opt));
										}
										return values;
										},
										
										optionValue: function(opt) {
										// extend element because hasAttribute may not be native
										return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
										}
										};
										
										/*--------------------------------------------------------------------------*/
										
										Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
										initialize: function($super, element, frequency, callback) {
										$super(callback, frequency);
										this.element   = $(element);
										this.lastValue = this.getValue();
										},
										
										execute: function() {
										var value = this.getValue();
										if (Object.isString(this.lastValue) && Object.isString(value) ?
										this.lastValue != value : String(this.lastValue) != String(value)) {
										this.callback(this.element, value);
										this.lastValue = value;
										}
										}
										});
										
										Form.Element.Observer = Class.create(Abstract.TimedObserver, {
										getValue: function() {
										return Form.Element.getValue(this.element);
										}
										});
										
										Form.Observer = Class.create(Abstract.TimedObserver, {
										getValue: function() {
										return Form.serialize(this.element);
										}
										});
										
										/*--------------------------------------------------------------------------*/
										
										Abstract.EventObserver = Class.create({
										initialize: function(element, callback) {
										this.element  = $(element);
										this.callback = callback;
										
										this.lastValue = this.getValue();
										if (this.element.tagName.toLowerCase() == 'form')
										this.registerFormCallbacks();
										else
										this.registerCallback(this.element);
										},
										
										onElementEvent: function() {
										var value = this.getValue();
										if (this.lastValue != value) {
										this.callback(this.element, value);
										this.lastValue = value;
										}
										},
										
										registerFormCallbacks: function() {
										Form.getElements(this.element).each(this.registerCallback, this);
										},
										
										registerCallback: function(element) {
										if (element.type) {
										switch (element.type.toLowerCase()) {
										case 'checkbox':
										case 'radio':
										Event.observe(element, 'click', this.onElementEvent.bind(this));
										break;
										default:
										Event.observe(element, 'change', this.onElementEvent.bind(this));
										break;
										}
										}
										}
										});
										
										Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
										getValue: function() {
										return Form.Element.getValue(this.element);
										}
										});
										
										Form.EventObserver = Class.create(Abstract.EventObserver, {
										getValue: function() {
										return Form.serialize(this.element);
										}
										});
										if (!window.Event) var Event = { };
										
										Object.extend(Event, {
										KEY_BACKSPACE: 8,
										KEY_TAB:       9,
										KEY_RETURN:   13,
										KEY_ESC:      27,
										KEY_LEFT:     37,
										KEY_UP:       38,
										KEY_RIGHT:    39,
										KEY_DOWN:     40,
										KEY_DELETE:   46,
										KEY_HOME:     36,
										KEY_END:      35,
										KEY_PAGEUP:   33,
										KEY_PAGEDOWN: 34,
										KEY_INSERT:   45,
										
										cache: { },
										
										relatedTarget: function(event) {
										var element;
										switch(event.type) {
										case 'mouseover': element = event.fromElement; break;
										case 'mouseout':  element = event.toElement;   break;
										default: return null;
										}
										return Element.extend(element);
										}
										});
										
										Event.Methods = (function() {
										var isButton;
										
										if (Prototype.Browser.IE) {
										var buttonMap = { 0: 1, 1: 4, 2: 2 };
										isButton = function(event, code) {
										return event.button == buttonMap[code];
										};
										
										} else if (Prototype.Browser.WebKit) {
										isButton = function(event, code) {
										switch (code) {
										case 0: return event.which == 1 && !event.metaKey;
										case 1: return event.which == 1 && event.metaKey;
										default: return false;
										}
										};
										
										} else {
										isButton = function(event, code) {
										return event.which ? (event.which === code + 1) : (event.button === code);
										};
										}
										
										return {
										isLeftClick:   function(event) { return isButton(event, 0) },
										isMiddleClick: function(event) { return isButton(event, 1) },
										isRightClick:  function(event) { return isButton(event, 2) },
										
										element: function(event) {
										var node = Event.extend(event).target;
										return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
										},
										
										findElement: function(event, expression) {
										var element = Event.element(event);
										if (!expression) return element;
										var elements = [element].concat(element.ancestors());
										return Selector.findElement(elements, expression, 0);
										},
										
										pointer: function(event) {
										return {
										x: event.pageX || (event.clientX +
										(document.documentElement.scrollLeft || document.body.scrollLeft)),
										y: event.pageY || (event.clientY +
										(document.documentElement.scrollTop || document.body.scrollTop))
										};
										},
										
										pointerX: function(event) { return Event.pointer(event).x },
										pointerY: function(event) { return Event.pointer(event).y },
										
										stop: function(event) {
										Event.extend(event);
										event.preventDefault();
										event.stopPropagation();
										event.stopped = true;
										}
										};
										})();
										
										Event.extend = (function() {
										var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
										m[name] = Event.Methods[name].methodize();
										return m;
										});
										
										if (Prototype.Browser.IE) {
										Object.extend(methods, {
										stopPropagation: function() { this.cancelBubble = true },
										preventDefault:  function() { this.returnValue = false },
										inspect: function() { return "[object Event]" }
										});
										
										return function(event) {
										if (!event) return false;
										if (event._extendedByPrototype) return event;
										
										event._extendedByPrototype = Prototype.emptyFunction;
										var pointer = Event.pointer(event);
										Object.extend(event, {
										target: event.srcElement,
										relatedTarget: Event.relatedTarget(event),
										pageX:  pointer.x,
										pageY:  pointer.y
										});
										return Object.extend(event, methods);
										};
										
										} else {
										Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
										Object.extend(Event.prototype, methods);
										return Prototype.K;
										}
										})();
										
										Object.extend(Event, (function() {
										var cache = Event.cache;
										
										function getEventID(element) {
										if (element._prototypeEventID) return element._prototypeEventID[0];
										arguments.callee.id = arguments.callee.id || 1;
										return element._prototypeEventID = [++arguments.callee.id];
										}
										
										function getDOMEventName(eventName) {
										if (eventName && eventName.include(':')) return "dataavailable";
										return eventName;
										}
										
										function getCacheForID(id) {
										return cache[id] = cache[id] || { };
										}
										
										function getWrappersForEventName(id, eventName) {
										var c = getCacheForID(id);
										return c[eventName] = c[eventName] || [];
										}
										
										function createWrapper(element, eventName, handler) {
										var id = getEventID(element);
										var c = getWrappersForEventName(id, eventName);
										if (c.pluck("handler").include(handler)) return false;
										
										var wrapper = function(event) {
										if (!Event || !Event.extend ||
										(event.eventName && event.eventName != eventName))
										return false;
										
										Event.extend(event);
										handler.call(element, event);
										};
										
										wrapper.handler = handler;
										c.push(wrapper);
										return wrapper;
										}
										
										function findWrapper(id, eventName, handler) {
										var c = getWrappersForEventName(id, eventName);
										return c.find(function(wrapper) { return wrapper.handler == handler });
										}
										
										function destroyWrapper(id, eventName, handler) {
										var c = getCacheForID(id);
										if (!c[eventName]) return false;
										c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
										}
										
										function destroyCache() {
										for (var id in cache)
										for (var eventName in cache[id])
										cache[id][eventName] = null;
										}
										
										if (window.attachEvent) {
										window.attachEvent("onunload", destroyCache);
										}
										
										return {
										observe: function(element, eventName, handler) {
										element = $(element);
										var name = getDOMEventName(eventName);
										
										var wrapper = createWrapper(element, eventName, handler);
										if (!wrapper) return element;
										
										if (element.addEventListener) {
										element.addEventListener(name, wrapper, false);
										} else {
										element.attachEvent("on" + name, wrapper);
										}
										
										return element;
										},
										
										stopObserving: function(element, eventName, handler) {
										element = $(element);
										var id = getEventID(element), name = getDOMEventName(eventName);
										
										if (!handler && eventName) {
										getWrappersForEventName(id, eventName).each(function(wrapper) {
										element.stopObserving(eventName, wrapper.handler);
										});
										return element;
										
										} else if (!eventName) {
										Object.keys(getCacheForID(id)).each(function(eventName) {
										element.stopObserving(eventName);
										});
										return element;
										}
										
										var wrapper = findWrapper(id, eventName, handler);
										if (!wrapper) return element;
										
										if (element.removeEventListener) {
										element.removeEventListener(name, wrapper, false);
										} else {
										element.detachEvent("on" + name, wrapper);
										}
										
										destroyWrapper(id, eventName, handler);
										
										return element;
										},
										
										fire: function(element, eventName, memo) {
										element = $(element);
										if (element == document && document.createEvent && !element.dispatchEvent)
										element = document.documentElement;
										
										var event;
										if (document.createEvent) {
										event = document.createEvent("HTMLEvents");
										event.initEvent("dataavailable", true, true);
										} else {
										event = document.createEventObject();
										event.eventType = "ondataavailable";
										}
										
										event.eventName = eventName;
										event.memo = memo || { };
										
										if (document.createEvent) {
										element.dispatchEvent(event);
										} else {
										element.fireEvent(event.eventType, event);
										}
										
										return Event.extend(event);
										}
										};
										})());
										
										Object.extend(Event, Event.Methods);
										
										Element.addMethods({
										fire:          Event.fire,
										observe:       Event.observe,
										stopObserving: Event.stopObserving
										});
										
										Object.extend(document, {
										fire:          Element.Methods.fire.methodize(),
										observe:       Element.Methods.observe.methodize(),
										stopObserving: Element.Methods.stopObserving.methodize(),
										loaded:        false
										});
										
										(function() {
										/* Support for the DOMContentLoaded event is based on work by Dan Webb,
										Matthias Miller, Dean Edwards and John Resig. */
										
										var timer;
										
										function fireContentLoadedEvent() {
										if (document.loaded) return;
										if (timer) window.clearInterval(timer);
										document.fire("dom:loaded");
										document.loaded = true;
										}
										
										if (document.addEventListener) {
										if (Prototype.Browser.WebKit) {
										timer = window.setInterval(function() {
										if (/loaded|complete/.test(document.readyState))
										fireContentLoadedEvent();
										}, 0);
										
										Event.observe(window, "load", fireContentLoadedEvent);
										
										} else {
										document.addEventListener("DOMContentLoaded",
										fireContentLoadedEvent, false);
										}
										
										} else {
										document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
										$("__onDOMContentLoaded").onreadystatechange = function() {
										if (this.readyState == "complete") {
										this.onreadystatechange = null;
										fireContentLoadedEvent();
										}
										};
										}
										})();
										/*------------------------------- DEPRECATED -------------------------------*/
										
										Hash.toQueryString = Object.toQueryString;
										
										var Toggle = { display: Element.toggle };
										
										Element.Methods.childOf = Element.Methods.descendantOf;
										
										var Insertion = {
										Before: function(element, content) {
										return Element.insert(element, {before:content});
										},
										
										Top: function(element, content) {
										return Element.insert(element, {top:content});
										},
										
										Bottom: function(element, content) {
										return Element.insert(element, {bottom:content});
										},
										
										After: function(element, content) {
										return Element.insert(element, {after:content});
										}
										};
										
										var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
										
										// This should be moved to script.aculo.us; notice the deprecated methods
										// further below, that map to the newer Element methods.
										var Position = {
										// set to true if needed, warning: firefox performance problems
										// NOT neeeded for page scrolling, only if draggable contained in
										// scrollable elements
										includeScrollOffsets: false,
										
										// must be called before calling withinIncludingScrolloffset, every time the
										// page is scrolled
										prepare: function() {
										this.deltaX =  window.pageXOffset
										|| document.documentElement.scrollLeft
										|| document.body.scrollLeft
										|| 0;
										this.deltaY =  window.pageYOffset
										|| document.documentElement.scrollTop
										|| document.body.scrollTop
										|| 0;
										},
										
										// caches x/y coordinate pair to use with overlap
										within: function(element, x, y) {
										if (this.includeScrollOffsets)
										return this.withinIncludingScrolloffsets(element, x, y);
										this.xcomp = x;
										this.ycomp = y;
										this.offset = Element.cumulativeOffset(element);
										
										return (y >= this.offset[1] &&
										y <  this.offset[1] + element.offsetHeight &&
										x >= this.offset[0] &&
										x <  this.offset[0] + element.offsetWidth);
										},
										
										withinIncludingScrolloffsets: function(element, x, y) {
										var offsetcache = Element.cumulativeScrollOffset(element);
										
										this.xcomp = x + offsetcache[0] - this.deltaX;
										this.ycomp = y + offsetcache[1] - this.deltaY;
										this.offset = Element.cumulativeOffset(element);
										
										return (this.ycomp >= this.offset[1] &&
										this.ycomp <  this.offset[1] + element.offsetHeight &&
										this.xcomp >= this.offset[0] &&
										this.xcomp <  this.offset[0] + element.offsetWidth);
										},
										
										// within must be called directly before
										overlap: function(mode, element) {
										if (!mode) return 0;
										if (mode == 'vertical')
										return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
										element.offsetHeight;
										if (mode == 'horizontal')
										return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
										element.offsetWidth;
										},
										
										// Deprecation layer -- use newer Element methods now (1.5.2).
										
										cumulativeOffset: Element.Methods.cumulativeOffset,
										
										positionedOffset: Element.Methods.positionedOffset,
										
										absolutize: function(element) {
										Position.prepare();
										return Element.absolutize(element);
										},
										
										relativize: function(element) {
										Position.prepare();
										return Element.relativize(element);
										},
										
										realOffset: Element.Methods.cumulativeScrollOffset,
										
										offsetParent: Element.Methods.getOffsetParent,
										
										page: Element.Methods.viewportOffset,
										
										clone: function(source, target, options) {
										options = options || { };
										return Element.clonePosition(target, source, options);
										}
										};
										
										/*--------------------------------------------------------------------------*/
										
										if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
										function iter(name) {
										return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
										}
										
										instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
										function(element, className) {
										className = className.toString().strip();
										var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
										return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
										} : function(element, className) {
										className = className.toString().strip();
										var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
										if (!classNames && !className) return elements;
										
										var nodes = $(element).getElementsByTagName('*');
										className = ' ' + className + ' ';
										
										for (var i = 0, child, cn; child = nodes[i]; i++) {
										if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
										(classNames && classNames.all(function(name) {
										return !name.toString().blank() && cn.include(' ' + name + ' ');
										}))))
										elements.push(Element.extend(child));
										}
										return elements;
										};
										
										return function(className, parentElement) {
										return $(parentElement || document.body).getElementsByClassName(className);
										};
										}(Element.Methods);
										
										/*--------------------------------------------------------------------------*/
										
										Element.ClassNames = Class.create();
										Element.ClassNames.prototype = {
										initialize: function(element) {
										this.element = $(element);
										},
										
										_each: function(iterator) {
										this.element.className.split(/\s+/).select(function(name) {
										return name.length > 0;
										})._each(iterator);
										},
										
										set: function(className) {
										this.element.className = className;
										},
										
										add: function(classNameToAdd) {
										if (this.include(classNameToAdd)) return;
										this.set($A(this).concat(classNameToAdd).join(' '));
										},
										
										remove: function(classNameToRemove) {
										if (!this.include(classNameToRemove)) return;
										this.set($A(this).without(classNameToRemove).join(' '));
										},
										
										toString: function() {
										return $A(this).join(' ');
										}
										};
										
										Object.extend(Element.ClassNames.prototype, Enumerable);
										
										/*--------------------------------------------------------------------------*/
										
Element.addMethods();