// JavaScript Document
	        /* Prototype JavaScript framework, version 1.6.0
			* (c) 2005-2007 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',
			
			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;
			
			if (Prototype.Browser.WebKit)
			Prototype.BrowserFeatures.XPath = 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 === undefined) return 'undefined';
			if (object === null) return 'null';
			return object.inspect ? object.inspect() : object.toString();
			} 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 (value !== undefined)
			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 && object.constructor === Array;
			},
			
			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 && arguments[0] === undefined) 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 = count === undefined ? 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 = truncation === undefined ? '...' : 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.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);
			}.bind(this));
			}
			});
			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 = fillWith === undefined ? 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 == undefined || 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 == undefined || 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, results = new Array(length);
			while (length--) results[length] = iterable[length];
			return results;
			}
			
			if (Prototype.Browser.WebKit) {
			function $A(iterable) {
			if (!iterable) return [];
			if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
			iterable.toArray) return iterable.toArray();
			var length = iterable.length, 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 (value !== undefined) 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() {
			if (function() {
			var i = 0, Test = function(value) { this.key = value };
			Test.prototype.key = 'foo';
			for (var property in new Test('bar')) i++;
			return i > 1;
			}()) {
			function each(iterator) {
			var cache = [];
			for (var key in this._object) {
			var value = this._object[key];
			if (cache.include(key)) continue;
			cache.push(key);
			var pair = [key, value];
			pair.key = key;
			pair.value = value;
			iterator(pair);
			}
			}
			} else {
			function each(iterator) {
			for (var key in this._object) {
			var value = this._object[key], pair = [key, value];
			pair.key = key;
			pair.value = value;
			iterator(pair);
			}
			}
			}
			
			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: each,
			
			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();
			}
			});
			
			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 && 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;
			}
			},
			
			getHeader: function(name) {
			try {
			return this.transport.getResponseHeader(name);
			} 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 = xml === undefined ? 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);
			} 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')))
			return null;
			try {
			return this.transport.responseText.evalJSON(options.sanitizeJSON);
			} 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 = options || { };
			var onComplete = options.onComplete;
			options.onComplete = (function(response, param) {
			this.updateContent(response.responseText);
			if (Object.isFunction(onComplete)) onComplete(response, param);
			}).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);
			}
			
			if (this.success()) {
			if (this.onComplete) this.onComplete.bind(this).defer();
			}
			}
			});
			
			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, t, range;
			
			for (position in insertions) {
			content = insertions[position];
			position = position.toLowerCase();
			t = Element._insertionTranslations[position];
			
			if (content && content.toElement) content = content.toElement();
			if (Object.isElement(content)) {
			t.insert(element, content);
			continue;
			}
			
			content = Object.toHTML(content);
			
			range = element.ownerDocument.createRange();
			t.initializeRange(element, range);
			t.insert(element, range.createContextualFragment(content.stripScripts()));
			
			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 $A($(element).getElementsByTagName('*')).each(Element.extend);
			},
			
			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 expression ? Selector.findElement(ancestors, expression, index) :
			ancestors[index || 0];
			},
			
			down: function(element, expression, index) {
			element = $(element);
			if (arguments.length == 1) return element.firstDescendant();
			var descendants = element.descendants();
			return expression ? Selector.findElement(descendants, expression, index) :
			descendants[index || 0];
			},
			
			previous: function(element, expression, index) {
			element = $(element);
			if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
			var previousSiblings = element.previousSiblings();
			return expression ? Selector.findElement(previousSiblings, expression, index) :
			previousSiblings[index || 0];
			},
			
			next: function(element, expression, index) {
			element = $(element);
			if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
			var nextSiblings = element.nextSiblings();
			return expression ? Selector.findElement(nextSiblings, expression, index) :
			nextSiblings[index || 0];
			},
			
			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] = value === undefined ? true : value;
			
			for (var attr in attributes) {
			var 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);
			
			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) return (e > a && e < nextAncestor.sourceIndex);
			}
			
			while (element = element.parentNode)
			if (element == ancestor) 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') ?
			(elementStyle.styleFloat === undefined ? '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 == 'relative' || p == 'absolute') 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 (!document.createRange || Prototype.Browser.Opera) {
			Element.Methods.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 t = Element._insertionTranslations, content, position, pos, tagName;
			
			for (position in insertions) {
			content = insertions[position];
			position = position.toLowerCase();
			pos = t[position];
			
			if (content && content.toElement) content = content.toElement();
			if (Object.isElement(content)) {
			pos.insert(element, content);
			continue;
			}
			
			content = Object.toHTML(content);
			tagName = ((position == 'before' || position == 'after')
			? element.parentNode : element).tagName.toUpperCase();
			
			if (t.tags[tagName]) {
			var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
			if (position == 'top' || position == 'after') fragments.reverse();
			fragments.each(pos.insert.curry(element));
			}
			else element.insertAdjacentHTML(pos.adjacency, content.stripScripts());
			
			content.evalScripts.bind(content).defer();
			}
			
			return element;
			};
			}
			
			if (Prototype.Browser.Opera) {
			Element.Methods._getStyle = Element.Methods.getStyle;
			Element.Methods.getStyle = function(element, style) {
			switch(style) {
			case 'left':
			case 'top':
			case 'right':
			case 'bottom':
			if (Element._getStyle(element, 'position') == 'static') return null;
			default: return Element._getStyle(element, style);
			}
			};
			Element.Methods._readAttribute = Element.Methods.readAttribute;
			Element.Methods.readAttribute = function(element, attribute) {
			if (attribute == 'title') return element.title;
			return Element._readAttribute(element, attribute);
			};
			}
			
			else if (Prototype.Browser.IE) {
			$w('positionedOffset getOffsetParent 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);
			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) {
			var 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.clone(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 Position.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 (document.createElement('div').outerHTML) {
			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];
			div.innerHTML = t[0] + html + t[1];
			t[2].times(function() { div = div.firstChild });
			return $A(div.childNodes);
			};
			
			Element._insertionTranslations = {
			before: {
			adjacency: 'beforeBegin',
			insert: function(element, node) {
			element.parentNode.insertBefore(node, element);
			},
			initializeRange: function(element, range) {
			range.setStartBefore(element);
			}
			},
			top: {
			adjacency: 'afterBegin',
			insert: function(element, node) {
			element.insertBefore(node, element.firstChild);
			},
			initializeRange: function(element, range) {
			range.selectNodeContents(element);
			range.collapse(true);
			}
			},
			bottom: {
			adjacency: 'beforeEnd',
			insert: function(element, node) {
			element.appendChild(node);
			}
			},
			after: {
			adjacency: 'afterEnd',
			insert: function(element, node) {
			element.parentNode.insertBefore(node, element.nextSibling);
			},
			initializeRange: function(element, range) {
			range.setStartAfter(element);
			}
			},
			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() {
			this.bottom.initializeRange = this.top.initializeRange;
			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 = { };
			$w('width height').each(function(d) {
			var D = d.capitalize();
			dimensions[d] = self['inner' + D] ||
			(document.documentElement['client' + D] || document.body['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();
			},
			
			compileMatcher: function() {
			// Selectors with namespaced attributes can't use the XPath version
			if (Prototype.BrowserFeatures.XPath && !(/(\[[\w-]*?:|:checked)/).test(this.expression))
			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: "[@#{1}]",
			attr: function(m) {
			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, m, 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 = false;',
			attr: function(m) {
			m[3] = (m[5] || m[6]);
			return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); 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 Selector.operators[matches[2]](nodeValue, matches[3]);
			}
			},
			
			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) {
			for (var i = 0, node; node = nodes[i]; i++)
			node._counted = true;
			return nodes;
			},
			
			unmark: function(nodes) {
			for (var i = 0, node; node = nodes[i]; i++)
			node._counted = 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._counted = true;
			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._counted)) node.nodeIndex = j++;
			}
			} else {
			for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
			if (node.nodeType == 1 && (!ofType || node._counted)) 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])._counted) {
			n._counted = true;
			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, children = [], 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) {
			tagName = 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() == tagName) 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) {
			if (!nodes) nodes = root.getElementsByTagName("*");
			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) {
			if (!nodes) nodes = root.getElementsByTagName("*");
			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._counted) {
			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._counted) 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() + '-'); }
			
			},
			
			matchElements: function(elements, expression) {
			var matches = new Selector(expression).findElements(), h = Selector.handlers;
			h.mark(matches);
			for (var i = 0, results = [], element; element = elements[i]; i++)
			if (element._counted) 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) {
			var exprs = expressions.join(','), expressions = [];
			exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
			expressions.push(m[1].strip());
			});
			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;
			}
			});
			
			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 (options.hash === undefined) 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 (value === undefined) return element.checked ? element.value : null;
			else element.checked = !!value;
			},
			
			textarea: function(element, value) {
			if (value === undefined) return element.value;
			else element.value = value;
			},
			
			select: function(element, index) {
			if (index === undefined)
			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);
			return element.match(expression) ? element : element.up(expression);
			},
			
			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._eventID) return element._eventID;
			arguments.callee.id = arguments.callee.id || 1;
			return element._eventID = ++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;
			
			if (document.createEvent) {
			var event = document.createEvent("HTMLEvents");
			event.initEvent("dataavailable", true, true);
			} else {
			var 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;
			}
			};
			})());
			
			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()
			});
			
			(function() {
			/* Support for the DOMContentLoaded event is based on work by Dan Webb,
			Matthias Miller, Dean Edwards and John Resig. */
			
			var timer, fired = false;
			
			function fireContentLoadedEvent() {
			if (fired) return;
			if (timer) window.clearInterval(timer);
			document.fire("dom:loaded");
			fired = 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();