//MooTools, My Object Oriented Javascript Tools. Copyright (c) 2006-2007 Valerio Proietti, <http://mad4milk.net>, MIT Style License.
  
  var MooTools = {
  	'version': '1.2dev',
  	'build': '1.2b2'
  };
  
  var Native = function(options){
  	options = options || {};
  
  	var afterImplement = options.afterImplement || function(){};
  	var generics = options.generics;
  	generics = (generics !== false);
  	var legacy = options.legacy;
  	var initialize = options.initialize;
  	var protect = options.protect;
  	var name = options.name;
  
  	var object = initialize || legacy;
  
  	object.constructor = Native;
  	object.$family = {name: 'native'};
  	if (legacy && initialize) object.prototype = legacy.prototype;
  	object.prototype.constructor = object;
  
  	if (name){
  		var family = name.toLowerCase();
  		object.prototype.$family = {name: family};
  		Native.typize(object, family);
  	}
  
  	var add = function(obj, name, method, force){
  		if (!protect || force || !obj.prototype[name]) obj.prototype[name] = method;
  		if (generics) Native.genericize(obj, name, protect);
  		afterImplement.call(obj, name, method);
  		return obj;
  	};
  
  	object.implement = function(a1, a2, a3){
  		if (typeof a1 == 'string') return add(this, a1, a2, a3);
  		for (var p in a1) add(this, p, a1[p], a2);
  		return this;
  	};
  
  	object.alias = function(existing, property, force){
  		existing = this.prototype[existing];
  		if (existing) add(this, property, existing, force);
  		return this;
  	};
  
  	return object;
  };
  
  Native.implement = function(objects, properties){
  	for (var i = 0, l = objects.length; i < l; i++) objects[i].implement(properties);
  };
  
  Native.genericize = function(object, property, check){
  	if ((!check || !object[property]) && typeof object.prototype[property] == 'function') object[property] = function(){
  		var args = Array.prototype.slice.call(arguments);
  		return object.prototype[property].apply(args.shift(), args);
  	};
  };
  
  Native.typize = function(object, family){
  	if (!object.type) object.type = function(item){
  		return ($type(item) === family);
  	};
  };
  
  (function(objects){
  	for (var name in objects) Native.typize(objects[name], name.toLowerCase());
  })({'Boolean': Boolean, 'Native': Native, 'Object': Object});
  
  (function(objects){
  	for (var name in objects) new Native({name: name, initialize: objects[name], protect: true});
  })({'String': String, 'Function': Function, 'Number': Number, 'Array': Array, 'RegExp': RegExp, 'Date': Date});
  
  (function(object, methods){
  	for (var i = 0, l = methods.length; i < l; i++) Native.genericize(object, methods[i], true);
  	return arguments.callee;
  })
  (Array, ['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift', 'concat', 'join', 'slice', 'toString', 'valueOf', 'indexOf', 'lastIndexOf'])
  (String, ['charAt', 'charCodeAt', 'concat', 'indexOf', 'lastIndexOf', 'match', 'replace', 'search', 'slice', 'split', 'substr', 'substring', 'toLowerCase', 'toUpperCase', 'valueOf']);
  
  function $chk(obj){
  	return !!(obj || obj === 0);
  };
  
  function $clear(timer){
  	clearTimeout(timer);
  	clearInterval(timer);
  	return null;
  };
  
  function $defined(obj){
  	return (obj != undefined);
  };
  
  function $empty(){};
  
  function $arguments(i){
  	return function(){
  		return arguments[i];
  	};
  };
  
  function $lambda(value){
  	return (typeof value == 'function') ? value : function(){
  		return value;
  	};
  };
  
  function $extend(original, extended){
  	for (var key in (extended || {})) original[key] = extended[key];
  	return original;
  };
  
  function $unlink(object){
  	var unlinked = null;
  
  	switch ($type(object)){
  		case 'object':
  			unlinked = {};
  			for (var p in object) unlinked[p] = $unlink(object[p]);
  		break;
  		case 'array':
  			unlinked = [];
  			for (var i = 0, l = object.length; i < l; i++) unlinked[i] = $unlink(object[i]);
  		break;
  		default: return object;
  	}
  
  	return unlinked;
  };
  
  function $merge(){
  	var mix = {};
  	for (var i = 0, l = arguments.length; i < l; i++){
  		var object = arguments[i];
  		if ($type(object) != 'object') continue;
  		for (var key in object){
  			var op = object[key], mp = mix[key];
  			mix[key] = (mp && $type(op) == 'object' && $type(mp) == 'object') ? $merge(mp, op) : $unlink(op);
  		}
  	}
  	return mix;
  };
  
  function $pick(){
  	for (var i = 0, l = arguments.length; i < l; i++){
  		if ($defined(arguments[i])) return arguments[i];
  	}
  	return null;
  };
  
  function $random(min, max){
  	return Math.floor(Math.random() * (max - min + 1) + min);
  };
  
  function $splat(obj){
  	var type = $type(obj);
  	return (type) ? ((type != 'array' && type != 'arguments') ? [obj] : obj) : [];
  };
  
  var $time = Date.now || function(){
  	return new Date().getTime();
  };
  
  function $try(fn, bind, args){
  	try {
  		return fn.apply(bind, $splat(args));
  	} catch(e){
  		return false;
  	}
  };
  
  function $type(obj){
  	if (obj == undefined) return false;
  	if (obj.$family) return (obj.$family.name == 'number' && !isFinite(obj)) ? false : obj.$family.name;
  	if (obj.nodeName){
  		switch (obj.nodeType){
  			case 1: return 'element';
  			case 3: return (/\S/).test(obj.nodeValue) ? 'textnode' : 'whitespace';
  		}
  	} else if (typeof obj.length == 'number'){
  		if (obj.callee) return 'arguments';
  		else if (obj.item) return 'collection';
  	}
  	return typeof obj;
  };
  
  var Hash = new Native({
  
  	name: 'Hash',
  
  	initialize: function(object){
  		if ($type(object) == 'hash') object = $unlink(object.getClean());
  		for (var key in object){
  			if (!this[key]) this[key] = object[key];
  		}
  		return this;
  	}
  
  });
  
  Hash.implement({
  
  	getLength: function(){
  		var length = 0;
  		for (var key in this){
  			if (this.hasOwnProperty(key)) length++;
  		}
  		return length;
  	},
  
  	forEach: function(fn, bind){
  		for (var key in this){
  			if (this.hasOwnProperty(key)) fn.call(bind, this[key], key, this);
  		}
  	},
  
  	getClean: function(){
  		var clean = {};
  		for (var key in this){
  			if (this.hasOwnProperty(key)) clean[key] = this[key];
  		}
  		return clean;
  	}
  
  });
  
  Hash.alias('forEach', 'each');
  
  function $H(object){
  	return new Hash(object);
  };
  
  Array.implement({
  
  	forEach: function(fn, bind){
  		for (var i = 0, l = this.length; i < l; i++) fn.call(bind, this[i], i, this);
  	}
  
  });
  
  Array.alias('forEach', 'each');
  
  function $A(iterable){
  	if ($type(iterable) == 'collection'){
  		var array = [];
  		for (var i = 0, l = iterable.length; i < l; i++) array[i] = iterable[i];
  		return array;
  	}
  	return Array.prototype.slice.call(iterable);
  };
  
  function $each(iterable, fn, bind){
  	var type = $type(iterable);
  	((type == 'arguments' || type == 'collection' || type == 'array') ? Array : Hash).each(iterable, fn, bind);
  };
  
  var Browser = new Hash({
  	Engine: {name: 'unknown', version: ''},
  	Platform: {name: (navigator.platform.match(/mac|win|linux|nix/i) || ['other'])[0].toLowerCase()},
  	Features: {xhr: !!(window.XMLHttpRequest), xpath: !!(document.evaluate), air: !!(window.runtime)}
  });
  
  if (window.opera) Browser.Engine.name = 'presto';
  else if (window.ActiveXObject) Browser.Engine = {name: 'trident', version: (Browser.Features.xhr) ? 5 : 4};
  else if (!navigator.taintEnabled) Browser.Engine = {name: 'webkit', version: (Browser.Features.xpath) ? 420 : 419};
  else if (document.getBoxObjectFor != null) Browser.Engine.name = 'gecko';
  Browser.Engine[Browser.Engine.name] = Browser.Engine[Browser.Engine.name + Browser.Engine.version] = true;
  Browser.Platform[Browser.Platform.name] = true;
  
  function $exec(text){
  	if (!text) return text;
  	if (window.execScript){
  		window.execScript(text);
  	} else {
  		var script = document.createElement('script');
  		script.setAttribute('type', 'text/javascript');
  		script.text = text;
  		document.head.appendChild(script);
  		document.head.removeChild(script);
  	}
  	return text;
  };
  
  Native.UID = 0;
  
  var Window = new Native({
  
  	name: 'Window',
  
  	legacy: window.Window,
  
  	initialize: function(win){
  		if (!win.Element){
  			win.Element = $empty;
  			if (Browser.Engine.webkit) win.document.createElement("iframe");
  			win.Element.prototype = (Browser.Engine.webkit) ? window["[[DOMElement.prototype]]"] : {};
  		}
  		win.uid = Native.UID++;
  		return $extend(win, Window.Prototype);
  	},
  
  	afterImplement: function(property, value){
  		window[property] = Window.Prototype[property] = value;
  	}
  
  });
  
  Window.Prototype = {$family: {name: 'window'}};
  
  new Window(window);
  
  var Document = new Native({
  
  	name: 'Document',
  
  	legacy: window.Document,
  
  	initialize: function(doc){
  		doc.head = doc.getElementsByTagName('head')[0];
  		doc.html = doc.getElementsByTagName('html')[0];
  		doc.window = doc.defaultView || doc.parentWindow;
  		if (Browser.Engine.trident4) $try(function(){
  			doc.execCommand("BackgroundImageCache", false, true);
  		});
  		doc.uid = Native.UID++;
  		return $extend(doc, Document.Prototype);
  	},
  
  	afterImplement: function(property, value){
  		document[property] = Document.Prototype[property] = value;
  	}
  
  });
  
  Document.Prototype = {$family: {name: 'document'}};
  
  new Document(document);
  
  Array.implement({
  
  	every: function(fn, bind){
  		for (var i = 0, l = this.length; i < l; i++){
  			if (!fn.call(bind, this[i], i, this)) return false;
  		}
  		return true;
  	},
  
  	filter: function(fn, bind){
  		var results = [];
  		for (var i = 0, l = this.length; i < l; i++){
  			if (fn.call(bind, this[i], i, this)) results.push(this[i]);
  		}
  		return results;
  	},
  
  	clean: function() {
  		return this.filter($arguments(0));
  	},
  
  	indexOf: function(item, from){
  		var len = this.length;
  		for (var i = (from < 0) ? Math.max(0, len + from) : from || 0; i < len; i++){
  			if (this[i] === item) return i;
  		}
  		return -1;
  	},
  
  	map: function(fn, bind){
  		var results = [];
  		for (var i = 0, l = this.length; i < l; i++) results[i] = fn.call(bind, this[i], i, this);
  		return results;
  	},
  
  	some: function(fn, bind){
  		for (var i = 0, l = this.length; i < l; i++){
  			if (fn.call(bind, this[i], i, this)) return true;
  		}
  		return false;
  	},
  
  	associate: function(keys){
  		var obj = {}, length = Math.min(this.length, keys.length);
  		for (var i = 0; i < length; i++) obj[keys[i]] = this[i];
  		return obj;
  	},
  
  	link: function(object){
  		var result = {};
  		for (var i = 0, l = this.length; i < l; i++){
  			for (var key in object){
  				if (object[key](this[i])){
  					result[key] = this[i];
  					delete object[key];
  					break;
  				}
  			}
  		}
  		return result;
  	},
  
  	contains: function(item, from){
  		return this.indexOf(item, from) != -1;
  	},
  
  	extend: function(array){
  		for (var i = 0, j = array.length; i < j; i++) this.push(array[i]);
  		return this;
  	},
  
  	getLast: function(){
  		return (this.length) ? this[this.length - 1] : null;
  	},
  
  	getRandom: function(){
  		return (this.length) ? this[$random(0, this.length - 1)] : null;
  	},
  
  	include: function(item){
  		if (!this.contains(item)) this.push(item);
  		return this;
  	},
  
  	merge: function(array){
  		for (var i = 0, l = array.length; i < l; i++) this.include(array[i]);
  		return this;
  	},
  
  	remove: function(item){
  		for (var i = this.length; i--; i){
  			if (this[i] === item) this.splice(i, 1);
  		}
  		return this;
  	},
  
  	empty: function(){
  		this.length = 0;
  		return this;
  	},
  
  	flatten: function(){
  		var array = [];
  		for (var i = 0, l = this.length; i < l; i++){
  			var type = $type(this[i]);
  			if (!type) continue;
  			array = array.concat((type == 'array' || type == 'collection' || type == 'arguments') ? Array.flatten(this[i]) : this[i]);
  		}
  		return array;
  	},
  
  	hexToRgb: function(array){
  		if (this.length != 3) return null;
  		var rgb = this.map(function(value){
  			if (value.length == 1) value += value;
  			return value.toInt(16);
  		});
  		return (array) ? rgb : 'rgb(' + rgb + ')';
  	},
  
  	rgbToHex: function(array){
  		if (this.length < 3) return null;
  		if (this.length == 4 && this[3] == 0 && !array) return 'transparent';
  		var hex = [];
  		for (var i = 0; i < 3; i++){
  			var bit = (this[i] - 0).toString(16);
  			hex.push((bit.length == 1) ? '0' + bit : bit);
  		}
  		return (array) ? hex : '#' + hex.join('');
  	}
  
  });
  
  Function.implement({
  
  	extend: function(properties){
  		for (var property in properties) this[property] = properties[property];
  		return this;
  	},
  
  	create: function(options){
  		var self = this;
  		options = options || {};
  		return function(event){
  			var args = options.arguments;
  			args = $defined(args) ? $splat(args) : Array.slice(arguments, (options.event) ? 1 : 0);
  			if (options.event) args = [event || window.event].extend(args);
  			var returns = function(){
  				return self.apply(options.bind || null, args);
  			};
  			if (options.delay) return setTimeout(returns, options.delay);
  			if (options.periodical) return setInterval(returns, options.periodical);
  			if (options.attempt) return $try(returns);
  			return returns();
  		};
  	},
  
  	pass: function(args, bind){
  		return this.create({'arguments': args, 'bind': bind});
  	},
  
  	attempt: function(args, bind){
  		return this.create({'arguments': args, 'bind': bind, 'attempt': true})();
  	},
  
  	bind: function(bind, args){
  		return this.create({'bind': bind, 'arguments': args});
  	},
  
  	bindWithEvent: function(bind, args){
  		return this.create({'bind': bind, 'event': true, 'arguments': args});
  	},
  
  	delay: function(delay, bind, args){
  		return this.create({'delay': delay, 'bind': bind, 'arguments': args})();
  	},
  
  	periodical: function(interval, bind, args){
  		return this.create({'periodical': interval, 'bind': bind, 'arguments': args})();
  	},
  
  	run: function(args, bind){
  		return this.apply(bind, $splat(args));
  	}
  
  });
  
  Number.implement({
  
  	limit: function(min, max){
  		return Math.min(max, Math.max(min, this));
  	},
  
  	round: function(precision){
  		precision = Math.pow(10, precision || 0);
  		return Math.round(this * precision) / precision;
  	},
  
  	times: function(fn, bind){
  		for (var i = 0; i < this; i++) fn.call(bind, i, this);
  	},
  
  	toFloat: function(){
  		return parseFloat(this);
  	},
  
  	toInt: function(base){
  		return parseInt(this, base || 10);
  	}
  
  });
  
  Number.alias('times', 'each');
  
  (function(math){
  	var methods = {};
  	math.each(function(name){
  		if (!Number[name]) methods[name] = function(){
  			return Math[name].apply(null, [this].concat($A(arguments)));
  		};
  	});
  	Number.implement(methods);
  })(['abs', 'acos', 'asin', 'atan', 'atan2', 'ceil', 'cos', 'exp', 'floor', 'log', 'max', 'min', 'pow', 'sin', 'sqrt', 'tan']);
  
  String.implement({
  
  	test: function(regex, params){
  		return ((typeof regex == 'string') ? new RegExp(regex, params) : regex).test(this);
  	},
  
  	contains: function(string, separator){
  		return (separator) ? (separator + this + separator).indexOf(separator + string + separator) > -1 : this.indexOf(string) > -1;
  	},
  
  	trim: function(){
  		return this.replace(/^\s+|\s+$/g, '');
  	},
  
  	clean: function(){
  		return this.replace(/\s+/g, ' ').trim();
  	},
  
  	camelCase: function(){
  		return this.replace(/-\D/g, function(match){
  			return match.charAt(1).toUpperCase();
  		});
  	},
  
  	hyphenate: function(){
  		return this.replace(/[A-Z]/g, function(match){
  			return ('-' + match.charAt(0).toLowerCase());
  		});
  	},
  
  	capitalize: function(){
  		return this.replace(/\b[a-z]/g, function(match){
  			return match.toUpperCase();
  		});
  	},
  
  	escapeRegExp: function(){
  		return this.replace(/([-.*+?^${}()|[\]\/\\])/g, '\\$1');
  	},
  
  	toInt: function(base){
  		return parseInt(this, base || 10);
  	},
  
  	toFloat: function(){
  		return parseFloat(this);
  	},
  
  	hexToRgb: function(array){
  		var hex = this.match(/^#?(\w{1,2})(\w{1,2})(\w{1,2})$/);
  		return (hex) ? hex.slice(1).hexToRgb(array) : null;
  	},
  
  	rgbToHex: function(array){
  		var rgb = this.match(/\d{1,3}/g);
  		return (rgb) ? rgb.rgbToHex(array) : null;
  	},
  
  	stripScripts: function(option){
  		var scripts = '';
  		var text = this.replace(/<script[^>]*>([\s\S]*?)<\/script>/gi, function(){
  			scripts += arguments[1] + '\n';
  			return '';
  		});
  		if (option === true) $exec(scripts);
  		else if ($type(option) == 'function') option(scripts, text);
  		return text;
  	}
  
  });
  
  Hash.implement({
  
  	has: Object.prototype.hasOwnProperty,
  
  	keyOf: function(value){
  		for (var key in this){
  			if (this.hasOwnProperty(key) && this[key] === value) return key;
  		}
  		return null;
  	},
  
  	hasValue: function(value){
  		return (Hash.keyOf(this, value) !== null);
  	},
  
  	extend: function(properties){
  		Hash.each(properties, function(value, key){
  			Hash.set(this, key, value);
  		}, this);
  		return this;
  	},
  
  	merge: function(properties){
  		Hash.each(properties, function(value, key){
  			Hash.include(this, key, value);
  		}, this);
  		return this;
  	},
  
  	remove: function(key){
  		if (this.hasOwnProperty(key)) delete this[key];
  		return this;
  	},
  
  	get: function(key){
  		return (this.hasOwnProperty(key)) ? this[key] : null;
  	},
  
  	set: function(key, value){
  		if (!this[key] || this.hasOwnProperty(key)) this[key] = value;
  		return this;
  	},
  
  	empty: function(){
  		Hash.each(this, function(value, key){
  			delete this[key];
  		}, this);
  		return this;
  	},
  
  	include: function(key, value){
  		var k = this[key];
  		if (!$defined(k)) this[key] = value;
  		return this;
  	},
  
  	map: function(fn, bind){
  		var results = new Hash;
  		Hash.each(this, function(value, key){
  			results.set(key, fn.call(bind, value, key, this));
  		}, this);
  		return results;
  	},
  
  	filter: function(fn, bind){
  		var results = new Hash;
  		Hash.each(this, function(value, key){
  			if (fn.call(bind, value, key, this)) results.set(key, value);
  		}, this);
  		return results;
  	},
  
  	every: function(fn, bind){
  		for (var key in this){
  			if (this.hasOwnProperty(key) && !fn.call(bind, this[key], key)) return false;
  		}
  		return true;
  	},
  
  	some: function(fn, bind){
  		for (var key in this){
  			if (this.hasOwnProperty(key) && fn.call(bind, this[key], key)) return true;
  		}
  		return false;
  	},
  
  	getKeys: function(){
  		var keys = [];
  		Hash.each(this, function(value, key){
  			keys.push(key);
  		});
  		return keys;
  	},
  
  	getValues: function(){
  		var values = [];
  		Hash.each(this, function(value){
  			values.push(value);
  		});
  		return values;
  	},
  
  	toQueryString: function(){
  		var queryString = [];
  		Hash.each(this, function(value, key){
  			$splat(value).each(function(val){
  				queryString.push(key + '=' + encodeURIComponent(val));
  			});
  		});
  		return queryString.join('&');
  	}
  
  });
  
  Hash.alias('keyOf', 'indexOf').alias('hasValue', 'contains').alias('remove', 'erase');
  
  var Event = new Native({
  
  	name: 'Event',
  
  	initialize: function(event, win){
  		win = win || window;
  		event = event || win.event;
  		if (event.$extended) return event;
  		this.$extended = true;
  		var type = event.type;
  		var target = event.target || event.srcElement;
  		while (target && target.nodeType == 3) target = target.parentNode;
  
  		if (type.match(/DOMMouseScroll|mousewheel/)){
  			var wheel = (event.wheelDelta) ? event.wheelDelta / 120 : -(event.detail || 0) / 3;
  		} else if (type.test(/key/)){
  			var code = event.which || event.keyCode;
  			var key = Event.Keys.keyOf(code);
  			if (type == 'keydown'){
  				var fKey = code - 111;
  				if (fKey > 0 && fKey < 13) key = 'f' + fKey;
  			}
  			key = key || String.fromCharCode(code).toLowerCase();
  		} else if (type.match(/(click|mouse|menu)/i)){
  			var page = {
  				x: event.pageX || event.clientX + win.document.documentElement.scrollLeft,
  				y: event.pageY || event.clientY + win.document.documentElement.scrollTop
  			};
  			var client = {
  				x: event.pageX ? event.pageX - win.pageXOffset : event.clientX,
  				y: event.pageY ? event.pageY - win.pageYOffset : event.clientY
  			};
  			var rightClick = (event.which == 3) || (event.button == 2);
  			var related = null;
  			if (type.match(/over|out/)){
  				switch (type){
  					case 'mouseover': related = event.relatedTarget || event.fromElement; break;
  					case 'mouseout': related = event.relatedTarget || event.toElement;
  				}
  				if ((function(){
  					while (related && related.nodeType == 3) related = related.parentNode;
  				}).create({attempt: Browser.Engine.gecko})() === false) related = false;
  			}
  		}
  
  		return $extend(this, {
  			event: event,
  			type: type,
  
  			page: page,
  			client: client,
  			rightClick: rightClick,
  
  			wheel: wheel,
  
  			relatedTarget: related,
  			target: target,
  
  			code: code,
  			key: key,
  
  			shift: event.shiftKey,
  			control: event.ctrlKey,
  			alt: event.altKey,
  			meta: event.metaKey
  		});
  	}
  
  });
  
  Event.Keys = new Hash({
  	'enter': 13,
  	'up': 38,
  	'down': 40,
  	'left': 37,
  	'right': 39,
  	'esc': 27,
  	'space': 32,
  	'backspace': 8,
  	'tab': 9,
  	'delete': 46
  });
  
  Event.implement({
  
  	stop: function(){
  		return this.stopPropagation().preventDefault();
  	},
  
  	stopPropagation: function(){
  		if (this.event.stopPropagation) this.event.stopPropagation();
  		else this.event.cancelBubble = true;
  		return this;
  	},
  
  	preventDefault: function(){
  		if (this.event.preventDefault) this.event.preventDefault();
  		else this.event.returnValue = false;
  		return this;
  	}
  
  });
  
  var Class = new Native({
  
  	name: 'Class',
  
  	initialize: function(properties){
  
  		properties = properties || {};
  
  		var klass = function(){
  			for (var property in this) this[property] = $unlink(this[property]);
  
  			this.parent = null;
  
  			['Implements', 'Extends'].each(function(Property){
  				if (!this[Property]) return;
  				Class[Property](this, this[Property]);
  				delete this[Property];
  			}, this);
  
  			this.constructor = klass;
  
  			var self = (arguments[0] !== $empty && this.initialize) ? this.initialize.apply(this, arguments) : this;
  			if (this.options && this.options.initialize) this.options.initialize.call(this);
  			return self;
  		};
  
  		$extend(klass, this);
  		klass.constructor = Class;
  		klass.prototype = properties;
  		return klass;
  	}
  
  });
  
  Class.implement({
  
  	implement: function(){
  		Class.Implements(this.prototype, Array.slice(arguments));
  		return this;
  	}
  
  });
  
  Class.Implements = function(self, klasses){
  	$splat(klasses).each(function(klass){
  		$extend(self, ($type(klass) == 'class') ? new klass($empty) : klass);
  	});
  };
  
  Class.Extends = function(self, klass){
  	klass = new klass($empty);
  	for (var property in klass){
  		var kp = klass[property];
  		var sp = self[property];
  		self[property] = (function(previous, current){
  			if ($defined(current) && previous != current){
  				var type = $type(current);
  				if (type != $type(previous)) return current;
  				switch (type){
  					case 'function':
  						return function(){
  							current.parent = self.parent = previous.bind(this);
  							var value = current.apply(this, arguments);
  							self.parent = current.parent;
  							return value;
  						};
  					case 'object': return $merge(previous, current);
  					default: return current;
  				}
  			}
  			return previous;
  		})(kp, sp);
  	}
  };
  
  Class.prototype.extend = function(properties){
  	properties.Extends = this;
  	return new Class(properties);
  };
  
  var Chain = new Class({
  
  	chain: function(){
  		this.$chain = (this.$chain || []).extend(arguments);
  		return this;
  	},
  
  	callChain: function(){
  		if (this.$chain && this.$chain.length) this.$chain.shift().apply(this, arguments);
  		return this;
  	},
  
  	clearChain: function(){
  		if (this.$chain) this.$chain.empty();
  		return this;
  	}
  
  });
  
  var Events = new Class({
  
  	addEvent: function(type, fn, internal){
  		if (fn != $empty){
  			this.$events = this.$events || {};
  			this.$events[type] = this.$events[type] || [];
  			this.$events[type].include(fn);
  			if (internal) fn.internal = true;
  		}
  		return this;
  	},
  
  	addEvents: function(events){
  		for (var type in events) this.addEvent(type, events[type]);
  		return this;
  	},
  
  	fireEvent: function(type, args, delay){
  		if (!this.$events || !this.$events[type]) return this;
  		this.$events[type].each(function(fn){
  			fn.create({'bind': this, 'delay': delay, 'arguments': args})();
  		}, this);
  		return this;
  	},
  
  	removeEvent: function(type, fn){
  		if (!this.$events || !this.$events[type]) return this;
  		if (!fn.internal) this.$events[type].remove(fn);
  		return this;
  	},
  
  	removeEvents: function(type){
  		for (var e in this.$events){
  			if (type && type != e) continue;
  			var fns = this.$events[e];
  			for (var i = fns.length; i--; i) this.removeEvent(e, fns[i]);
  		}
  		return this;
  	}
  
  });
  
  var Options = new Class({
  
  	setOptions: function(){
  		this.options = $merge.run([this.options].extend(arguments));
  		if (!this.addEvent) return this;
  		for (var option in this.options){
  			if ($type(this.options[option]) != 'function' || !(/^on[A-Z]/).test(option)) continue;
  			this.addEvent(option, this.options[option]);
  			delete this.options[option];
  		}
  		return this;
  	}
  
  });
  
  Document.implement({
  
  	newElement: function(tag, props){
  		if (Browser.Engine.trident && props){
  			['name', 'type', 'checked'].each(function(attribute){
  				if (!props[attribute]) return;
  				tag += ' ' + attribute + '="' + props[attribute] + '"';
  				if (attribute != 'checked') delete props[attribute];
  			});
  			tag = '<' + tag + '>';
  		}
  		return $.element(this.createElement(tag)).set(props);
  	},
  
  	newTextNode: function(text){
  		return this.createTextNode(text);
  	},
  
  	getDocument: function(){
  		return this;
  	},
  
  	getWindow: function(){
  		return this.defaultView || this.parentWindow;
  	}
  
  });
  
  var Element = new Native({
  
  	name: 'Element',
  
  	legacy: window.Element,
  
  	initialize: function(tag, props){
  		var konstructor = Element.Constructors.get(tag);
  		if (konstructor) return konstructor(props);
  		if (typeof tag == 'string') return document.newElement(tag, props);
  		return $(tag).set(props);
  	},
  
  	afterImplement: function(key, value){
  		if (!Array[key]) Elements.implement(key, Elements.multi(key));
  		Element.Prototype[key] = value;
  	}
  
  });
  
  Element.Prototype = {$family: {name: 'element'}};
  
  Element.Constructors = new Hash;
  
  var IFrame = new Native({
  
  	name: 'IFrame',
  
  	generics: false,
  
  	initialize: function(){
  		Native.UID++;
  		var params = Array.link(arguments, {properties: Object.type, iframe: $defined});
  		var props = params.properties || {};
  		var iframe = $(params.iframe) || false;
  		var onload = props.onload || $empty;
  		delete props.onload;
  		props.id = props.name = $pick(props.id, props.name, iframe.id, iframe.name, 'IFrame_' + Native.UID);
  		((iframe = iframe || new Element('iframe'))).set(props);
  		var onFrameLoad = function(){
  			var host = $try(function(){
  				return iframe.contentWindow.location.host;
  			});
  			if (host && host == window.location.host){
  				iframe.window = iframe.contentWindow;
  				var win = new Window(iframe.window);
  				var doc = new Document(iframe.window.document);
  				$extend(win.Element.prototype, Element.Prototype);
  			}
  			onload.call(iframe.contentWindow);
  		};
  		(!window.frames[props.id]) ? iframe.addListener('load', onFrameLoad) : onFrameLoad();
  		return iframe;
  	}
  
  });
  
  var Elements = new Native({
  
  	initialize: function(elements, options){
  		options = $extend({ddup: true, cash: true}, options);
  		elements = elements || [];
  		if (options.ddup || options.cash){
  			var uniques = {};
  			var returned = [];
  			for (var i = 0, l = elements.length; i < l; i++){
  				var el = $.element(elements[i], !options.cash);
  				if (options.ddup){
  					if (uniques[el.uid]) continue;
  					uniques[el.uid] = true;
  				}
  				returned.push(el);
  			}
  			elements = returned;
  		}
  		return (options.cash) ? $extend(elements, this) : elements;
  	}
  
  });
  
  Elements.implement({
  
  	filterBy: function(filter){
  		if (!filter) return this;
  		return new Elements(this.filter((typeof filter == 'string') ? function(item){
  			return item.match(filter);
  		} : filter));
  	}
  
  });
  
  Elements.multi = function(property){
  	return function(){
  		var items = [];
  		var elements = true;
  		for (var i = 0, j = this.length; i < j; i++){
  			var returns = this[i][property].apply(this[i], arguments);
  			items.push(returns);
  			if (elements) elements = ($type(returns) == 'element');
  		}
  		return (elements) ? new Elements(items) : items;
  	};
  };
  
  Window.implement({
  
  	$: function(el, notrash){
  		if (el && el.$attributes) return el;
  		var type = $type(el);
  		return ($[type]) ? $[type](el, notrash, this.document) : null;
  	},
  
  	$$: function(selector){
  		if (arguments.length == 1 && typeof selector == 'string') return this.document.getElements(selector);
  		var elements = [];
  		var args = Array.flatten(arguments);
  		for (var i = 0, l = args.length; i < l; i++){
  			var item = args[i];
  			switch ($type(item)){
  				case 'element': item = [item]; break;
  				case 'string': item = this.document.getElements(item, true); break;
  				default: item = false;
  			}
  			if (item) elements.extend(item);
  		}
  		return new Elements(elements);
  	},
  
  	getDocument: function(){
  		return this.document;
  	},
  
  	getWindow: function(){
  		return this;
  	}
  
  });
  
  $.string = function(id, notrash, doc){
  	id = doc.getElementById(id);
  	return (id) ? $.element(id, notrash) : null;
  };
  
  $.element = function(el, notrash){
  	el.uid = el.uid || [Native.UID++];
  	if (!notrash && Garbage.collect(el) && !el.$family) $extend(el, Element.Prototype);
  	return el;
  };
  
  $.textnode = $.window = $.document = $arguments(0);
  
  $.number = function(uid){
  	return Garbage.Elements[uid] || null;
  };
  
  Native.implement([Element, Document], {
  
  	getElement: function(selector, notrash){
  		return $(this.getElements(selector, true)[0] || null, notrash);
  	},
  
  	getElements: function(tags, nocash){
  		tags = tags.split(',');
  		var elements = [];
  		var ddup = (tags.length > 1);
  		tags.each(function(tag){
  			var partial = this.getElementsByTagName(tag.trim());
  			(ddup) ? elements.extend(partial) : elements = partial;
  		}, this);
  		return new Elements(elements, {ddup: ddup, cash: !nocash});
  	}
  
  });
  
  Element.Storage = {
  
  	get: function(uid){
  		return (this[uid] = this[uid] || {});
  	}
  
  };
  
  Element.Inserters = new Hash({
  
  	before: function(context, element){
  		if (element.parentNode) element.parentNode.insertBefore(context, element);
  	},
  
  	after: function(context, element){
  		if (!element.parentNode) return;
  		var next = element.nextSibling;
  		(next) ? element.parentNode.insertBefore(context, next) : element.parentNode.appendChild(context);
  	},
  
  	bottom: function(context, element){
  		element.appendChild(context);
  	},
  
  	top: function(context, element){
  		var first = element.firstChild;
  		(first) ? element.insertBefore(context, first) : element.appendChild(context);
  	}
  
  });
  
  Element.Inserters.inside = Element.Inserters.bottom;
  
  Element.Inserters.each(function(value, key){
  
  	var Key = key.capitalize();
  
  	Element.implement('inject' + Key, function(el){
  		Element.Inserters[key](this, $(el, true));
  		return this;
  	});
  
  	Element.implement('grab' + Key, function(el){
  		Element.Inserters[key]($(el, true), this);
  		return this;
  	});
  
  });
  
  Element.implement({
  
  	getDocument: function(){
  		return this.ownerDocument;
  	},
  
  	getWindow: function(){
  		return this.ownerDocument.getWindow();
  	},
  
  	getElementById: function(id, nocash){
  		var el = this.ownerDocument.getElementById(id);
  		if (!el) return null;
  		for (var parent = el.parentNode; parent != this; parent = parent.parentNode){
  			if (!parent) return null;
  		}
  		return $.element(el, nocash);
  	},
  
  	set: function(prop, value){
  		switch ($type(prop)){
  			case 'object':
  				for (var p in prop) this.set(p, prop[p]);
  				break;
  			case 'string':
  				var property = Element.Properties.get(prop);
  				(property && property.set) ? property.set.apply(this, Array.slice(arguments, 1)) : this.setProperty(prop, value);
  		}
  		return this;
  	},
  
  	get: function(prop){
  		var property = Element.Properties.get(prop);
  		return (property && property.get) ? property.get.apply(this, Array.slice(arguments, 1)) : this.getProperty(prop);
  	},
  
  	erase: function(prop){
  		var property = Element.Properties.get(prop);
  		(property && property.erase) ? property.erase.apply(this, Array.slice(arguments, 1)) : this.removeProperty(prop);
  		return this;
  	},
  
  	match: function(tag){
  		return (!tag || Element.get(this, 'tag') == tag);
  	},
  
  	inject: function(el, where){
  		Element.Inserters.get(where || 'bottom')(this, $(el, true));
  		return this;
  	},
  
  	wraps: function(el, where){
  		el = $(el, true);
  		return this.replaces(el).grab(el);
  	},
  
  	grab: function(el, where){
  		Element.Inserters.get(where || 'bottom')($(el, true), this);
  		return this;
  	},
  
  	appendText: function(text, where){
  		return this.grab(this.getDocument().newTextNode(text), where);
  	},
  
  	adopt: function(){
  		Array.flatten(arguments).each(function(element){
  			this.appendChild($(element, true));
  		}, this);
  		return this;
  	},
  
  	dispose: function(){
  		return this.parentNode.removeChild(this);
  	},
  
  	clone: function(contents){
  		var temp = new Element('div').grab(this.cloneNode(contents !== false));
  		Array.each(temp.getElementsByTagName('*'), function(element){
  			if (element.id) element.removeAttribute('id');
  		});
  		return new Element('div').set('html', temp.innerHTML).getFirst();
  	},
  
  	replaces: function(el){
  		el = $(el, true);
  		el.parentNode.replaceChild(this, el);
  		return this;
  	},
  
  	hasClass: function(className){
  		return this.className.contains(className, ' ');
  	},
  
  	addClass: function(className){
  		if (!this.hasClass(className)) this.className = (this.className + ' ' + className).clean();
  		return this;
  	},
  
  	removeClass: function(className){
  		this.className = this.className.replace(new RegExp('(^|\\s)' + className + '(?:\\s|$)'), '$1').clean();
  		return this;
  	},
  
  	toggleClass: function(className){
  		return this.hasClass(className) ? this.removeClass(className) : this.addClass(className);
  	},
  
  	getComputedStyle: function(property){
  		var result = null;
  		if (this.currentStyle){
  			result = this.currentStyle[property.camelCase()];
  		} else {
  			var computed = this.getWindow().getComputedStyle(this, null);
  			if (computed) result = computed.getPropertyValue([property.hyphenate()]);
  		}
  		return result;
  	},
  
  	empty: function(){
  		var elements = $A(this.getElementsByTagName('*'));
  		elements.each(function(element){
  			$try(Element.prototype.dispose, element);
  		});
  		Garbage.trash(elements);
  		$try(Element.prototype.set, this, ['html', '']);
  		return this;
  	},
  
  	destroy: function(){
  		Garbage.kill(this.empty().dispose());
  		return null;
  	},
  
  	toQueryString: function(){
  		var queryString = [];
  		this.getElements('input, select, textarea', true).each(function(el){
  			var name = el.name, type = el.type, value = Element.get(el, 'value');
  			if (value === false || !name || el.disabled) return;
  			$splat(value).each(function(val){
  				queryString.push(name + '=' + encodeURIComponent(val));
  			});
  		});
  		return queryString.join('&');
  	},
  
  	getProperty: function(attribute){
  		var EA = Element.Attributes, key = EA.Props[attribute];
  		var value = (key) ? this[key] : this.getAttribute(attribute);
  		return (EA.Bools[attribute]) ? !!value : value;
  	},
  
  	getProperties: function(){
  		var args = $A(arguments);
  		return args.map(function(attr){
  			return this.getProperty(attr);
  		}, this).associate(args);
  	},
  
  	setProperty: function(attribute, value){
  		var EA = Element.Attributes, key = EA.Props[attribute], hasValue = $defined(value);
  		if (key && EA.Bools[attribute]) value = (value || !hasValue) ? true : false;
  		else if (!hasValue) return this.removeProperty(attribute);
  		(key) ? this[key] = value : this.setAttribute(attribute, value);
  		return this;
  	},
  
  	setProperties: function(attributes){
  		for (var attribute in attributes) this.setProperty(attribute, attributes[attribute]);
  		return this;
  	},
  
  	removeProperty: function(attribute){
  		var EA = Element.Attributes, key = EA.Props[attribute], isBool = (key && EA.Bools[attribute]);
  		(key) ? this[key] = (isBool) ? false : '' : this.removeAttribute(attribute);
  		return this;
  	},
  
  	removeProperties: function(){
  		Array.each(arguments, this.removeProperty, this);
  		return this;
  	}
  
  });
  
  (function(){
  
  var walk = function(element, walk, start, match, all, nocash){
  	var el = element[start || walk];
  	var elements = [];
  	while (el){
  		if (el.nodeType == 1 && Element.match(el, match)){
  			elements.push(el);
  			if (!all) break;
  		}
  		el = el[walk];
  	}
  	return (all) ? new Elements(elements, {ddup: false, cash: !nocash}) : $(elements[0], nocash);
  };
  
  Element.implement({
  
  	getPrevious: function(match, nocash){
  		return walk(this, 'previousSibling', null, match, false, nocash);
  	},
  
  	getAllPrevious: function(match, nocash){
  		return walk(this, 'previousSibling', null, match, true, nocash);
  	},
  
  	getNext: function(match, nocash){
  		return walk(this, 'nextSibling', null, match, false, nocash);
  	},
  
  	getAllNext: function(match, nocash){
  		return walk(this, 'nextSibling', null, match, true, nocash);
  	},
  
  	getFirst: function(match, nocash){
  		return walk(this, 'nextSibling', 'firstChild', match, false, nocash);
  	},
  
  	getLast: function(match, nocash){
  		return walk(this, 'previousSibling', 'lastChild', match, false, nocash);
  	},
  
  	getParent: function(match, nocash){
  		return walk(this, 'parentNode', null, match, false, nocash);
  	},
  
  	getParents: function(match, nocash){
  		return walk(this, 'parentNode', null, match, true, nocash);
  	},
  
  	getChildren: function(match, nocash){
  		return walk(this, 'nextSibling', 'firstChild', match, true, nocash);
  	},
  
  	hasChild: function(el){
  		if (!(el = $(el, true))) return false;
  		return Element.getParents(el, this.get('tag'), true).contains(this);
  	}
  
  });
  
  })();
  
  Element.alias('dispose', 'remove').alias('getLast', 'getLastChild');
  
  Element.Properties = new Hash;
  
  Element.Properties.style = {
  
  	set: function(style){
  		this.style.cssText = style;
  	},
  
  	get: function(){
  		return this.style.cssText;
  	},
  
  	erase: function(){
  		this.style.cssText = '';
  	}
  
  };
  
  Element.Properties.value = {get: function(){
  	switch (Element.get(this, 'tag')){
  		case 'select':
  			var values = [];
  			Array.each(this.options, function(option){
  				if (option.selected) values.push(option.value);
  			});
  			return (this.multiple) ? values : values[0];
  		case 'input': if (['checkbox', 'radio'].contains(this.type) && !this.checked) return false;
  		default: return $pick(this.value, false);
  	}
  }};
  
  Element.Properties.tag = {get: function(){
  	return this.tagName.toLowerCase();
  }};
  
  Element.Properties.html = {set: function(){
  	return this.innerHTML = Array.flatten(arguments).join('');
  }};
  
  Element.implement({
  
  	getText: function(){
  		return this.get('text');
  	},
  
  	setText: function(text){
  		return this.set('text', text);
  	},
  
  	setHTML: function(){
  		return this.set('html', arguments);
  	},
  
  	getHTML: function(){
  		return this.get('html');
  	},
  
  	getTag: function(){
  		return this.get('tag');
  	}
  
  });
  
  Native.implement([Element, Window, Document], {
  
  	addListener: function(type, fn){
  		if (this.addEventListener) this.addEventListener(type, fn, false);
  		else this.attachEvent('on' + type, fn);
  		return this;
  	},
  
  	removeListener: function(type, fn){
  		if (this.removeEventListener) this.removeEventListener(type, fn, false);
  		else this.detachEvent('on' + type, fn);
  		return this;
  	},
  
  	retrieve: function(property, dflt){
  		var storage = Element.Storage.get(this.uid);
  		var prop = storage[property];
  		if ($defined(dflt) && !$defined(prop)) prop = storage[property] = dflt;
  		return $pick(prop);
  	},
  
  	store: function(property, value){
  		var storage = Element.Storage.get(this.uid);
  		storage[property] = value;
  		return this;
  	},
  
  	eliminate: function(property){
  		var storage = Element.Storage.get(this.uid);
  		delete storage[property];
  		return this;
  	}
  
  });
  
  Element.Attributes = new Hash({
  	Props: {'html': 'innerHTML', 'class': 'className', 'for': 'htmlFor', 'text': (Browser.Engine.trident) ? 'innerText' : 'textContent'},
  	Bools: ['compact', 'nowrap', 'ismap', 'declare', 'noshade', 'checked', 'disabled', 'readonly', 'multiple', 'selected', 'noresize', 'defer'],
  	Camels: ['value', 'accessKey', 'cellPadding', 'cellSpacing', 'colSpan', 'frameBorder', 'maxLength', 'readOnly', 'rowSpan', 'tabIndex', 'useMap']
  });
  
  (function(EA){
  
  	var EAB = EA.Bools, EAC = EA.Camels;
  	EA.Bools = EAB = EAB.associate(EAB);
  	Hash.extend(Hash.merge(EA.Props, EAB), EAC.associate(EAC.map(function(v){
  		return v.toLowerCase();
  	})));
  	EA.remove('Camels');
  
  })(Element.Attributes);
  
  var Garbage = {
  
  	Elements: {},
  
  	ignored: {object: 1, embed: 1, OBJECT: 1, EMBED: 1},
  
  	collect: function(el){
  		if (el.$attributes) return true;
  		if (Garbage.ignored[el.tagName]) return false;
  		Garbage.Elements[el.uid] = el;
  		el.$attributes = {};
  		return true;
  	},
  
  	trash: function(elements){
  		for (var i = elements.length, el; i--; i) Garbage.kill(elements[i]);
  	},
  
  	kill: function(el){
  		if (!el || !el.$attributes) return;
  		delete Garbage.Elements[el.uid];
  		if (el.retrieve('events')) el.removeEvents();
  		for (var p in el.$attributes) el.$attributes[p] = null;
  		if (Browser.Engine.trident){
  			for (var d in Element.Prototype) el[d] = null;
  		}
  		el.$attributes = el.uid = null;
  	},
  
  	empty: function(){
  		for (var uid in Garbage.Elements) Garbage.kill(Garbage.Elements[uid]);
  	}
  
  };
  
  window.addListener('beforeunload', function(){
  	window.addListener('unload', Garbage.empty);
  	if (Browser.Engine.trident) window.addListener('unload', CollectGarbage);
  });
  
  Element.Properties.events = {set: function(events){
  	this.addEvents(events);
  }};
  
  Native.implement([Element, Window, Document], {
  
  	addEvent: function(type, fn){
  		var events = this.retrieve('events', {});
  		events[type] = events[type] || {'keys': [], 'values': []};
  		if (events[type].keys.contains(fn)) return this;
  		events[type].keys.push(fn);
  		var realType = type, custom = Element.Events.get(type), condition = fn, self = this;
  		if (custom){
  			if (custom.onAdd) custom.onAdd.call(this, fn);
  			if (custom.condition){
  				condition = function(event){
  					if (custom.condition.call(this, event)) return fn.call(this, event);
  					return false;
  				};
  			}
  			realType = custom.base || realType;
  		}
  		var defn = function(){
  			return fn.call(self);
  		};
  		var nativeEvent = Element.NativeEvents[realType] || 0;
  		if (nativeEvent){
  			if (nativeEvent == 2){
  				defn = function(event){
  					event = new Event(event, self.getWindow());
  					if (condition.call(self, event) === false) event.stop();
  				};
  			}
  			this.addListener(realType, defn);
  		}
  		events[type].values.push(defn);
  		return this;
  	},
  
  	removeEvent: function(type, fn){
  		var events = this.retrieve('events');
  		if (!events || !events[type]) return this;
  		var pos = events[type].keys.indexOf(fn);
  		if (pos == -1) return this;
  		var key = events[type].keys.splice(pos, 1)[0];
  		var value = events[type].values.splice(pos, 1)[0];
  		var custom = Element.Events.get(type);
  		if (custom){
  			if (custom.onRemove) custom.onRemove.call(this, fn);
  			type = custom.base || type;
  		}
  		return (Element.NativeEvents[type]) ? this.removeListener(type, value) : this;
  	},
  
  	addEvents: function(events){
  		for (var event in events) this.addEvent(event, events[event]);
  		return this;
  	},
  
  	removeEvents: function(type){
  		var events = this.retrieve('events');
  		if (!events) return this;
  		if (!type){
  			for (var evType in events) this.removeEvents(evType);
  			events = null;
  		} else if (events[type]){
  			while (events[type].keys[0]) this.removeEvent(type, events[type].keys[0]);
  			events[type] = null;
  		}
  		return this;
  	},
  
  	fireEvent: function(type, args, delay){
  		var events = this.retrieve('events');
  		if (!events || !events[type]) return this;
  		events[type].keys.each(function(fn){
  			fn.create({'bind': this, 'delay': delay, 'arguments': args})();
  		}, this);
  		return this;
  	},
  
  	cloneEvents: function(from, type){
  		from = $(from);
  		var fevents = from.retrieve('events');
  		if (!fevents) return this;
  		if (!type){
  			for (var evType in fevents) this.cloneEvents(from, evType);
  		} else if (fevents[type]){
  			fevents[type].keys.each(function(fn){
  				this.addEvent(type, fn);
  			}, this);
  		}
  		return this;
  	}
  
  });
  
  Element.NativeEvents = {
  	'click': 2, 'dblclick': 2, 'mouseup': 2, 'mousedown': 2, 'contextmenu': 2,
  	'mousewheel': 2, 'DOMMouseScroll': 2,
  	'mouseover': 2, 'mouseout': 2, 'mousemove': 2, 'selectstart': 2, 'selectend': 2,
  	'keydown': 2, 'keypress': 2, 'keyup': 2,
  	'focus': 2, 'blur': 2, 'change': 2, 'reset': 2, 'select': 2, 'submit': 2,
  	'load': 1, 'unload': 1, 'beforeunload': 1, 'resize': 1, 'move': 1, 'DOMContentLoaded': 1, 'readystatechange': 1,
  	'error': 1, 'abort': 1, 'scroll': 1
  };
  
  (function(){
  
  var checkRelatedTarget = function(event){
  	var related = event.relatedTarget;
  	if (!related) return true;
  	return ($type(this) != 'document' && related != this && related.prefix != 'xul' && !this.hasChild(related));
  };
  
  Element.Events = new Hash({
  
  	mouseenter: {
  
  		base: 'mouseover',
  
  		condition: checkRelatedTarget
  
  	},
  
  	mouseleave: {
  
  		base: 'mouseout',
  
  		condition: checkRelatedTarget
  
  	},
  
  	mousewheel: {
  
  		base: (Browser.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel'
  
  	}
  
  });
  
  })();
  
  Element.Properties.styles = {set: function(styles){
  	this.setStyles(styles);
  }};
  
  Element.Properties.opacity = {
  
  	set: function(opacity, novisibility){
  		if (!novisibility){
  			if (opacity == 0){
  				if (this.style.visibility != 'hidden') this.style.visibility = 'hidden';
  			} else {
  				if (this.style.visibility != 'visible') this.style.visibility = 'visible';
  			}
  		}
  		if (!this.currentStyle || !this.currentStyle.hasLayout) this.style.zoom = 1;
  		if (Browser.Engine.trident) this.style.filter = (opacity == 1) ? '' : 'alpha(opacity=' + opacity * 100 + ')';
  		this.style.opacity = opacity;
  		this.store('opacity', opacity);
  	},
  
  	get: function(){
  		return this.retrieve('opacity', 1);
  	}
  
  };
  
  Element.implement({
  
  	setOpacity: function(value){
  		return this.set('opacity', value, true);
  	},
  
  	getOpacity: function(){
  		return this.get('opacity');
  	},
  
  	setStyle: function(property, value){
  		switch (property){
  			case 'opacity': return this.set('opacity', parseFloat(value));
  			case 'float': property = (Browser.Engine.trident) ? 'styleFloat' : 'cssFloat';
  		}
  		property = property.camelCase();
  		if ($type(value) != 'string'){
  			var map = (Element.Styles.get(property) || '@').split(' ');
  			value = $splat(value).map(function(val, i){
  				if (!map[i]) return '';
  				return ($type(val) == 'number') ? map[i].replace('@', Math.round(val)) : val;
  			}).join(' ');
  		} else if (value == String(Number(value))){
  			value = Math.round(value);
  		}
  		this.style[property] = value;
  		return this;
  	},
  
  	getStyle: function(property){
  		switch (property){
  			case 'opacity': return this.get('opacity');
  			case 'float': property = (Browser.Engine.trident) ? 'styleFloat' : 'cssFloat';
  		}
  		property = property.camelCase();
  		var result = this.style[property];
  		if (!$chk(result)){
  			result = [];
  			for (var style in Element.ShortStyles){
  				if (property != style) continue;
  				for (var s in Element.ShortStyles[style]) result.push(this.getStyle(s));
  				return result.join(' ');
  			}
  			result = this.getComputedStyle(property);
  		}
  		if (result){
  			result = String(result);
  			var color = result.match(/rgba?\([\d\s,]+\)/);
  			if (color) result = result.replace(color[0], color[0].rgbToHex());
  		}
  		if (Browser.Engine.presto || (Browser.Engine.trident && !$chk(parseInt(result)))){
  			if (property.test(/^(height|width)$/)){
  				var values = (property == 'width') ? ['left', 'right'] : ['top', 'bottom'], size = 0;
  				values.each(function(value){
  					size += this.getStyle('border-' + value + '-width').toInt() + this.getStyle('padding-' + value).toInt();
  				}, this);
  				return this['offset' + property.capitalize()] - size + 'px';
  			}
  			if (Browser.Engine.presto && String(result).test('px')) return result;
  			if (property.test(/(border(.+)Width|margin|padding)/)) return '0px';
  		}
  		return result;
  	},
  
  	setStyles: function(styles){
  		for (var style in styles) this.setStyle(style, styles[style]);
  		return this;
  	},
  
  	getStyles: function(){
  		var result = {};
  		Array.each(arguments, function(key){
  			result[key] = this.getStyle(key);
  		}, this);
  		return result;
  	}
  
  });
  
  Element.Styles = new Hash({
  	width: '@px', height: '@px', left: '@px', top: '@px', bottom: '@px', right: '@px', maxWidth: '@px', maxHeight: '@px',
  	backgroundColor: 'rgb(@, @, @)', backgroundPosition: '@px @px', color: 'rgb(@, @, @)',
  	fontSize: '@px', letterSpacing: '@px', lineHeight: '@px', clip: 'rect(@px @px @px @px)',
  	margin: '@px @px @px @px', padding: '@px @px @px @px', border: '@px @ rgb(@, @, @) @px @ rgb(@, @, @) @px @ rgb(@, @, @)',
  	borderWidth: '@px @px @px @px', borderStyle: '@ @ @ @', borderColor: 'rgb(@, @, @) rgb(@, @, @) rgb(@, @, @) rgb(@, @, @)',
  	zIndex: '@', 'zoom': '@', fontWeight: '@',
  	textIndent: '@px', opacity: '@'
  });
  
  Element.ShortStyles = {'margin': {}, 'padding': {}, 'border': {}, 'borderWidth': {}, 'borderStyle': {}, 'borderColor': {}};
  
  ['Top', 'Right', 'Bottom', 'Left'].each(function(direction){
  	var Short = Element.ShortStyles;
  	var All = Element.Styles;
  	['margin', 'padding'].each(function(style){
  		var sd = style + direction;
  		Short[style][sd] = All[sd] = '@px';
  	});
  	var bd = 'border' + direction;
  	Short.border[bd] = All[bd] = '@px @ rgb(@, @, @)';
  	var bdw = bd + 'Width', bds = bd + 'Style', bdc = bd + 'Color';
  	Short[bd] = {};
  	Short.borderWidth[bdw] = Short[bd][bdw] = All[bdw] = '@px';
  	Short.borderStyle[bds] = Short[bd][bds] = All[bds] = '@';
  	Short.borderColor[bdc] = Short[bd][bdc] = All[bdc] = 'rgb(@, @, @)';
  });
  
  (function(){
  
  function $body(el){
  	return el.tagName.toLowerCase() == 'body';
  };
  
  Element.implement({
  
  	positioned: function(){
  		if ($body(this)) return true;
  		return (Element.getComputedStyle(this, 'position') != 'static');
  	},
  
  	getOffsetParent: function(){
  		if ($body(this)) return null;
  		if (!Browser.Engine.trident) return $(this.offsetParent);
  		var el = this;
  		while ((el = el.parentNode)){
  			if (Element.positioned(el)) return $(el);
  		}
  		return null;
  	},
  
  	getSize: function(){
  		if ($body(this)) return this.getWindow().getSize();
  		return {x: this.offsetWidth, y: this.offsetHeight};
  	},
  
  	getScrollSize: function(){
  		if ($body(this)) return this.getWindow().getScrollSize();
  		return {x: this.scrollWidth, y: this.scrollHeight};
  	},
  
  	getScroll: function(){
  		if ($body(this)) return this.getWindow().getScroll();
  		return {x: this.scrollLeft, y: this.scrollTop};
  	},
  
  	scrollTo: function(x, y){
  		if ($body(this)) return this.getWindow().scrollTo(x, y);
  		this.scrollLeft = x;
  		this.scrollTop = y;
  		return this;
  	},
  
  	getPosition: function(relative){
  		if ($body(this)) return {x: 0, y: 0};
  		var el = this, position = {x: 0, y: 0};
  		while (el){
  			position.x += el.offsetLeft;
  			position.y += el.offsetTop;
  			el = el.offsetParent;
  		}
  		var rpos = (relative) ? $(relative).getPosition() : {x: 0, y: 0};
  		return {x: position.x - rpos.x, y: position.y - rpos.y};
  	},
  
  	getCoordinates: function(element){
  		if ($body(this)) return this.getWindow().getCoordinates();
  		var position = this.getPosition(element), size = this.getSize();
  		var obj = {'top': position.y, 'left': position.x, 'width': size.x, 'height': size.y};
  		obj.right = obj.left + obj.width;
  		obj.bottom = obj.top + obj.height;
  		return obj;
  	},
  
  	getRelativePosition: function(){
  		return this.getPosition(this.getOffsetParent());
  	},
  
  	computePosition: function(obj){
  		return {
  			left: obj.x - (this.getComputedStyle('margin-left').toInt() || 0),
  			top: obj.y - (this.getComputedStyle('margin-top').toInt() || 0)
  		};
  	},
  
  	position: function(obj){
  		return this.setStyles(this.computePosition(obj));
  	}
  
  });
  
  })();
  
  Native.implement([Window, Document], {
  
  	getSize: function(){
  		var body = this.getDocument().body, html = this.getDocument().documentElement;
  		if (Browser.Engine.webkit419) return {x: this.innerWidth, y: this.innerHeight};
  		return {x: html.clientWidth, y: html.clientHeight};
  	},
  
  	getScroll: function(){
  		var html = this.getDocument().documentElement;
  		return {x: $pick(this.pageXOffset, html.scrollLeft), y: $pick(this.pageYOffset, html.scrollTop)};
  	},
  
  	getScrollSize: function(){
  		var html = this.getDocument().documentElement, body = this.getDocument().body;
  		if (Browser.Engine.trident) return {x: Math.max(html.clientWidth, html.scrollWidth), y: Math.max(html.clientHeight, html.scrollHeight)};
  		if (Browser.Engine.webkit) return {x: body.scrollWidth, y: body.scrollHeight};
  		return {x: html.scrollWidth, y: html.scrollHeight};
  	},
  
  	getPosition: function(){
  		return {x: 0, y: 0};
  	},
  
  	getCoordinates: function(){
  		var size = this.getSize();
  		return {top: 0, left: 0, height: size.y, width: size.x, bottom: size.y, right: size.x};
  	}
  
  });
  
  Native.implement([Window, Document, Element], {
  
  	getHeight: function(){
  		return this.getSize().y;
  	},
  
  	getWidth: function(){
  		return this.getSize().x;
  	},
  
  	getScrollTop: function(){
  		return this.getScroll().y;
  	},
  
  	getScrollLeft: function(){
  		return this.getScroll().x;
  	},
  
  	getScrollHeight: function(){
  		return this.getScrollSize().y;
  	},
  
  	getScrollWidth: function(){
  		return this.getScrollSize().x;
  	},
  
  	getTop: function(){
  		return this.getPosition().y;
  	},
  
  	getLeft: function(){
  		return this.getPosition().x;
  	}
  
  });
  
  Native.implement([Element, Document], {
  
  	getElements: function(selectors, nocash){
  		var Local = {};
  		selectors = selectors.split(',');
  		var elements = [], j = selectors.length;
  		var ddup = (j > 1);
  		for (var i = 0; i < j; i++){
  			var selector = selectors[i], items = [], separators = [];
  			selector = selector.trim().replace(Selectors.sRegExp, function(match){
  				if (match.charAt(2)) match = match.trim();
  				separators.push(match.charAt(0));
  				return ':)' + match.charAt(1);
  			}).split(':)');
  			for (var k = 0, l = selector.length; k < l; k++){
  				var sel = Selectors.parse(selector[k]);
  				if (!sel) return [];
  				var temp = Selectors.Method.getParam(items, separators[k - 1] || false, this, sel, Local);
  				if (!temp) break;
  				items = temp;
  			}
  			var partial = Selectors.Method.getItems(items, this);
  			elements = (ddup) ? elements.concat(partial) : partial;
  		}
  		return new Elements(elements, {ddup: ddup, cash: !nocash});
  	}
  
  });
  
  Window.implement({
  
  	$E: function(selector){
  		return this.document.getElement(selector);
  	}
  
  });
  
  var Selectors = {
  
  	regExp: (/:([^-:(]+)[^:(]*(?:\((["']?)(.*?)\2\))?|\[(\w+)(?:([!*^$~|]?=)(["']?)(.*?)\6)?\]|\.[\w-]+|#[\w-]+|\w+|\*/g),
  
  	sRegExp: (/\s*([+>~\s])[a-zA-Z#.*\s]/g)
  
  };
  
  Selectors.parse = function(selector){
  	var params = {tag: '*', id: null, classes: [], attributes: [], pseudos: []};
  	selector = selector.replace(Selectors.regExp, function(bit){
  		switch (bit.charAt(0)){
  			case '.': params.classes.push(bit.slice(1)); break;
  			case '#': params.id = bit.slice(1); break;
  			case '[': params.attributes.push([arguments[4], arguments[5], arguments[7]]); break;
  			case ':':
  				var xparser = Selectors.Pseudo.get(arguments[1]);
  				if (!xparser){
  					params.attributes.push([arguments[1], arguments[3] ? '=' : '', arguments[3]]);
  					break;
  				}
  				var pseudo = {'name': arguments[1], 'parser': xparser, 'argument': (xparser.parser) ? xparser.parser(arguments[3]) : arguments[3]};
  				params.pseudos.push(pseudo);
  			break;
  			default: params.tag = bit;
  		}
  		return '';
  	});
  	return params;
  };
  
  Selectors.Pseudo = new Hash;
  
  Selectors.XPath = {
  
  	getParam: function(items, separator, context, params){
  		var temp = '';
  		switch (separator){
  			case ' ': temp += '//'; break;
  			case '>': temp += '/'; break;
  			case '+': temp += '/following-sibling::*[1]/self::'; break;
  			case '~': temp += '/following-sibling::'; break;
  		}
  		temp += (context.namespaceURI) ? 'xhtml:' + params.tag : params.tag;
  		var i;
  		for (i = params.pseudos.length; i--; i){
  			var pseudo = params.pseudos[i];
  			if (pseudo.parser && pseudo.parser.xpath) temp += pseudo.parser.xpath(pseudo.argument);
  			else temp += ($chk(pseudo.argument)) ? '[@' + pseudo.name + '="' + pseudo.argument + '"]' : '[@' + pseudo.name + ']';
  		}
  		if (params.id) temp += '[@id="' + params.id + '"]';
  		for (i = params.classes.length; i--; i) temp += '[contains(concat(" ", @class, " "), " ' + params.classes[i] + ' ")]';
  		for (i = params.attributes.length; i--; i){
  			var bits = params.attributes[i];
  			switch (bits[1]){
  				case '=': temp += '[@' + bits[0] + '="' + bits[2] + '"]'; break;
  				case '*=': temp += '[contains(@' + bits[0] + ', "' + bits[2] + '")]'; break;
  				case '^=': temp += '[starts-with(@' + bits[0] + ', "' + bits[2] + '")]'; break;
  				case '$=': temp += '[substring(@' + bits[0] + ', string-length(@' + bits[0] + ') - ' + bits[2].length + ' + 1) = "' + bits[2] + '"]'; break;
  				case '!=': temp += '[@' + bits[0] + '!="' + bits[2] + '"]'; break;
  				case '~=': temp += '[contains(concat(" ", @' + bits[0] + ', " "), " ' + bits[2] + ' ")]'; break;
  				case '|=': temp += '[contains(concat("-", @' + bits[0] + ', "-"), "-' + bits[2] + '-")]'; break;
  				default: temp += '[@' + bits[0] + ']';
  			}
  		}
  		items.push(temp);
  		return items;
  	},
  
  	getItems: function(items, context){
  		var elements = [];
  		var doc = context.getDocument();
  		var xpath = doc.evaluate('.//' + items.join(''), context, Selectors.XPath.resolver, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
  		for (var i = 0, j = xpath.snapshotLength; i < j; i++) elements[i] = xpath.snapshotItem(i);
  		return elements;
  	},
  
  	resolver: function(prefix){
  		return (prefix == 'xhtml') ? 'http://www.w3.org/1999/xhtml' : false;
  	}
  
  };
  
  Selectors.Filter = {
  
  	getParam: function(items, separator, context, params, Local){
  		var found = [];
  		var tag = params.tag;
  		if (separator){
  			var uniques = {}, child, children, item, k, l;
  			var add = function(child){
  				child.uid = child.uid || [Native.UID++];
  				if (!uniques[child.uid] && Selectors.Filter.match(child, params, Local)){
  					uniques[child.uid] = true;
  					found.push(child);
  					return true;
  				}
  				return false;
  			};
  			for (var i = 0, j = items.length; i < j; i++){
  				item = items[i];
  				switch(separator){
  					case ' ':
  						children = item.getElementsByTagName(tag);
  						params.tag = false;
  						for (k = 0, l = children.length; k < l; k++) add(children[k]);
  					break;
  					case '>':
  						children = item.childNodes;
  						for (k = 0, l = children.length; k < l; k++){
  							if (children[k].nodeType == 1) add(children[k]);
  						}
  					break;
  					case '+':
  						while ((item = item.nextSibling)){
  							if (item.nodeType == 1){
  								add(item);
  								break;
  							}
  						}
  					break;
  					case '~':
  						while ((item = item.nextSibling)){
  							if (item.nodeType == 1 && add(item)) break;
  						}
  					break;
  				}
  			}
  			return found;
  		}
  		if (params.id){
  			el = context.getElementById(params.id, true);
  			params.id = false;
  			return (el && Selectors.Filter.match(el, params, Local)) ? [el] : false;
  		} else {
  			items = context.getElementsByTagName(tag);
  			params.tag = false;
  			for (var m = 0, n = items.length; m < n; m++){
  				if (Selectors.Filter.match(items[m], params, Local)) found.push(items[m]);
  			}
  		}
  		return found;
  	},
  
  	getItems: $arguments(0)
  
  };
  
  Selectors.Filter.match = function(el, params, Local){
  	Local = Local || {};
  
  	if (params.id && params.id != el.id) return false;
  	if (params.tag && params.tag != '*' && params.tag != el.tagName.toLowerCase()) return false;
  
  	var i;
  
  	for (i = params.classes.length; i--; i){
  		if (!el.className || !el.className.contains(params.classes[i], ' ')) return false;
  	}
  
  	for (i = params.attributes.length; i--; i){
  		var bits = params.attributes[i];
  		var result = Element.prototype.getProperty.call(el, bits[0]);
  		if (!result) return false;
  		if (!bits[1]) continue;
  		var condition;
  		switch (bits[1]){
  			case '=': condition = (result == bits[2]); break;
  			case '*=': condition = (result.contains(bits[2])); break;
  			case '^=': condition = (result.substr(0, bits[2].length) == bits[2]); break;
  			case '$=': condition = (result.substr(result.length - bits[2].length) == bits[2]); break;
  			case '!=': condition = (result != bits[2]); break;
  			case '~=': condition = result.contains(bits[2], ' '); break;
  			case '|=': condition = result.contains(bits[2], '-');
  		}
  
  		if (!condition) return false;
  	}
  
  	for (i = params.pseudos.length; i--; i){
  		if (!params.pseudos[i].parser.filter.call(el, params.pseudos[i].argument, Local)) return false;
  	}
  
  	return true;
  };
  
  Selectors.Method = (Browser.Features.xpath) ? Selectors.XPath : Selectors.Filter;
  
  Element.implement({
  
  	match: function(selector){
  		return (!selector || Selectors.Filter.match(this, Selectors.parse(selector)));
  	}
  
  });
  
  Selectors.Pseudo.enabled = {
  
  	xpath: function(){
  		return '[not(@disabled)]';
  	},
  
  	filter: function(){
  		return !(this.disabled);
  	}
  };
  Selectors.Pseudo.empty = {
  
  	xpath: function(){
  		return '[not(node())]';
  	},
  
  	filter: function(){
  		return !(this.innerText || this.textContent || '').length;
  	}
  
  };
  Selectors.Pseudo.contains = {
  
  	xpath: function(argument){
  		return '[contains(text(), "' + argument + '")]';
  	},
  
  	filter: function(argument){
  		for (var i = this.childNodes.length; i--; i){
  			var child = this.childNodes[i];
  			if (child.nodeName && child.nodeType == 3 && child.nodeValue.contains(argument)) return true;
  		}
  		return false;
  	}
  
  };
  
  Selectors.Pseudo.nth = {
  
  	parser: function(argument){
  		argument = (argument) ? argument.match(/^([+-]?\d*)?([devon]+)?([+-]?\d*)?$/) : [null, 1, 'n', 0];
  		if (!argument) return false;
  		var inta = parseInt(argument[1]);
  		var a = ($chk(inta)) ? inta : 1;
  		var special = argument[2] || false;
  		var b = parseInt(argument[3]) || 0;
  		b = b - 1;
  		while (b < 1) b += a;
  		while (b >= a) b -= a;
  		switch (special){
  			case 'n': return {'a': a, 'b': b, 'special': 'n'};
  			case 'odd': return {'a': 2, 'b': 0, 'special': 'n'};
  			case 'even': return {'a': 2, 'b': 1, 'special': 'n'};
  			case 'first': return {'a': 0, 'special': 'index'};
  			case 'last': return {'special': 'last'};
  			case 'only': return {'special': 'only'};
  			default: return {'a': (a - 1), 'special': 'index'};
  		}
  	},
  
  	xpath: function(argument){
  		switch (argument.special){
  			case 'n': return '[count(preceding-sibling::*) mod ' + argument.a + ' = ' + argument.b + ']';
  			case 'last': return '[count(following-sibling::*) = 0]';
  			case 'only': return '[not(preceding-sibling::* or following-sibling::*)]';
  			default: return '[count(preceding-sibling::*) = ' + argument.a + ']';
  		}
  	},
  
  	filter: function(argument, Local){
  		var count = 0, el = this;
  		switch (argument.special){
  			case 'n':
  				Local.Positions = Local.Positions || {};
  				if (!Local.Positions[this.uid]){
  					var children = this.parentNode.childNodes;
  					for (var i = 0, l = children.length; i < l; i++){
  						var child = children[i];
  						if (child.nodeType != 1) continue;
  						child.uid = child.uid || [Native.UID++];
  						Local.Positions[child.uid] = count++;
  					}
  				}
  				return (Local.Positions[this.uid] % argument.a == argument.b);
  			case 'last':
  				while ((el = el.nextSibling)){
  					if (el.nodeType == 1) return false;
  				}
  				return true;
  			case 'only':
  				var prev = el;
  				while((prev = prev.previousSibling)){
  					if (prev.nodeType == 1) return false;
  				}
  				var next = el;
  				while ((next = next.nextSibling)){
  					if (next.nodeType == 1) return false;
  				}
  				return true;
  			case 'index':
  				while ((el = el.previousSibling)){
  					if (el.nodeType == 1 && ++count > argument.a) return false;
  				}
  				return true;
  		}
  		return false;
  	}
  
  };
  
  Selectors.Pseudo.extend({
  
  	'even': {
  		parser: function(){
  			return {'a': 2, 'b': 1, 'special': 'n'};
  		},
  		xpath: Selectors.Pseudo.nth.xpath,
  		filter: Selectors.Pseudo.nth.filter
  	},
  
  	'odd': {
  		parser: function(){
  			return {'a': 2, 'b': 0, 'special': 'n'};
  		},
  		xpath: Selectors.Pseudo.nth.xpath,
  		filter: Selectors.Pseudo.nth.filter
  	},
  
  	'first': {
  		parser: function(){
  			return {'a': 0, 'special': 'index'};
  		},
  		xpath: Selectors.Pseudo.nth.xpath,
  		filter: Selectors.Pseudo.nth.filter
  	},
  
  	'last': {
  		parser: function(){
  			return {'special': 'last'};
  		},
  		xpath: Selectors.Pseudo.nth.xpath,
  		filter: Selectors.Pseudo.nth.filter
  	},
  
  	'only': {
  		parser: function(){
  			return {'special': 'only'};
  		},
  		xpath: Selectors.Pseudo.nth.xpath,
  		filter: Selectors.Pseudo.nth.filter
  	}
  
  });
  
  Element.Events.domready = {
  
  	onAdd: function(fn){
  
  		if (Browser.loaded) return fn.call(this);
  
  		var self = this, win = this.getWindow(), doc = this.getDocument();
  
  		var domready = function(){
  			if (!arguments.callee.done){
  				arguments.callee.done = true;
  				fn.call(self);
  			};
  			return true;
  		};
  
  		var states = (Browser.Engine.webkit) ? ['loaded', 'complete'] : 'complete';
  
  		var check = function(context){
  			if (states.contains(context.readyState)) return domready();
  			return false;
  		};
  
  		if (doc.readyState && Browser.Engine.webkit){
  
  			(function(){
  				if (!check(doc)) arguments.callee.delay(50);
  			})();
  
  		} else if (doc.readyState && Browser.Engine.trident){
  
  			var script = $('ie_domready');
  			if (!script){
  				var src = (win.location.protocol == 'https:') ? '//:' : 'javascript:void(0)';
  				doc.write('<script id="ie_domready" defer src="' + src + '"></script>');
  				script = $('ie_domready');
  			}
  			if (!check(script)) script.addEvent('readystatechange', check.pass(script));
  
  		} else {
  
  			win.addEvent('load', domready);
  			doc.addEvent('DOMContentLoaded', domready);
  
  		}
  
  		return null;
  	}
  
  };
  
  window.addEvent('domready', function(){
  	Browser.loaded = true;
  });
  
  var Color = new Native({
  
  	initialize: function(color, type){
  		if (arguments.length >= 3){
  			type = "rgb"; color = Array.slice(arguments, 0, 3);
  		} else if (typeof color == 'string'){
  			if (color.match(/rgb/)) color = color.rgbToHex().hexToRgb(true);
  			else if (color.match(/hsb/)) color = color.hsbToRgb();
  			else color = color.hexToRgb(true);
  		}
  		type = type || 'rgb';
  		switch (type){
  			case 'hsb':
  				var old = color;
  				color = color.hsbToRgb();
  				color.hsb = old;
  			break;
  			case 'hex': color = color.hexToRgb(true); break;
  		}
  		color.rgb = color.slice(0, 3);
  		color.hsb = color.hsb || color.rgbToHsb();
  		color.hex = color.rgbToHex();
  		return $extend(color, this);
  	}
  
  });
  
  Color.implement({
  
  	mix: function(){
  		var colors = Array.slice(arguments);
  		var alpha = ($type(colors.getLast()) == 'number') ? colors.pop() : 50;
  		var rgb = this.slice();
  		colors.each(function(color){
  			color = new Color(color);
  			for (var i = 0; i < 3; i++) rgb[i] = Math.round((rgb[i] / 100 * (100 - alpha)) + (color[i] / 100 * alpha));
  		});
  		return new Color(rgb, 'rgb');
  	},
  
  	invert: function(){
  		return new Color(this.map(function(value){
  			return 255 - value;
  		}));
  	},
  
  	setHue: function(value){
  		return new Color([value, this.hsb[1], this.hsb[2]], 'hsb');
  	},
  
  	setSaturation: function(percent){
  		return new Color([this.hsb[0], percent, this.hsb[2]], 'hsb');
  	},
  
  	setBrightness: function(percent){
  		return new Color([this.hsb[0], this.hsb[1], percent], 'hsb');
  	}
  
  });
  
  function $RGB(r, g, b){
  	return new Color([r, g, b], 'rgb');
  };
  
  function $HSB(h, s, b){
  	return new Color([h, s, b], 'hsb');
  };
  
  function $HEX(hex){
  	return new Color(hex, 'hex');
  };
  
  Array.implement({
  
  	rgbToHsb: function(){
  		var red = this[0], green = this[1], blue = this[2];
  		var hue, saturation, brightness;
  		var max = Math.max(red, green, blue), min = Math.min(red, green, blue);
  		var delta = max - min;
  		brightness = max / 255;
  		saturation = (max != 0) ? delta / max : 0;
  		if (saturation == 0){
  			hue = 0;
  		} else {
  			var rr = (max - red) / delta;
  			var gr = (max - green) / delta;
  			var br = (max - blue) / delta;
  			if (red == max) hue = br - gr;
  			else if (green == max) hue = 2 + rr - br;
  			else hue = 4 + gr - rr;
  			hue /= 6;
  			if (hue < 0) hue++;
  		}
  		return [Math.round(hue * 360), Math.round(saturation * 100), Math.round(brightness * 100)];
  	},
  
  	hsbToRgb: function(){
  		var br = Math.round(this[2] / 100 * 255);
  		if (this[1] == 0){
  			return [br, br, br];
  		} else {
  			var hue = this[0] % 360;
  			var f = hue % 60;
  			var p = Math.round((this[2] * (100 - this[1])) / 10000 * 255);
  			var q = Math.round((this[2] * (6000 - this[1] * f)) / 600000 * 255);
  			var t = Math.round((this[2] * (6000 - this[1] * (60 - f))) / 600000 * 255);
  			switch (Math.floor(hue / 60)){
  				case 0: return [br, t, p];
  				case 1: return [q, br, p];
  				case 2: return [p, br, t];
  				case 3: return [p, q, br];
  				case 4: return [t, p, br];
  				case 5: return [br, p, q];
  			}
  		}
  		return false;
  	}
  
  });
  
  String.implement({
  
  	rgbToHsb: function(){
  		var rgb = this.match(/\d{1,3}/g);
  		return (rgb) ? hsb.rgbToHsb() : null;
  	},
  
  	hsbToRgb: function(){
  		var hsb = this.match(/\d{1,3}/g);
  		return (hsb) ? hsb.hsbToRgb() : null;
  	}
  
  });
  
  var Group = new Class({
  
  	initialize: function(){
  		this.instances = Array.flatten(arguments);
  		this.events = {};
  		this.checker = {};
  	},
  
  	addEvent: function(type, fn){
  		this.checker[type] = this.checker[type] || {};
  		this.events[type] = this.events[type] || [];
  		if (this.events[type].contains(fn)) return false;
  		else this.events[type].push(fn);
  		this.instances.each(function(instance, i){
  			instance.addEvent(type, this.check.bind(this, [type, instance, i]));
  		}, this);
  		return this;
  	},
  
  	check: function(type, instance, i){
  		this.checker[type][i] = true;
  		var every = this.instances.every(function(current, j){
  			return this.checker[type][j] || false;
  		}, this);
  		if (!every) return;
  		this.checker[type] = {};
  		this.events[type].each(function(event){
  			event.call(this, this.instances, instance);
  		}, this);
  	}
  
  });
  
  var Fx = new Class({
  
  	Implements: [Chain, Events, Options],
  
  	options: {
  		fps: 50,
  		unit: false,
  		duration: 500,
  		link: 'ignore',
  		transition: function(p){
  			return -(Math.cos(Math.PI * p) - 1) / 2;
  		}
  	},
  
  	initialize: function(options){
  		this.pass = this.pass || this;
  		this.setOptions(options);
  		this.options.duration = Fx.Durations[this.options.duration] || this.options.duration.toInt();
  		var wait = this.options.wait;
  		if (wait === false) this.options.link = 'cancel';
  	},
  
  	step: function(){
  		var time = $time();
  		if (time < this.time + this.options.duration){
  			var delta = this.options.transition((time - this.time) / this.options.duration);
  			this.set(this.compute(this.from, this.to, delta));
  		} else {
  			this.set(this.compute(this.from, this.to, 1));
  			this.complete();
  		}
  	},
  
  	set: function(now){
  		return now;
  	},
  
  	compute: function(from, to, delta){
  		return Fx.compute(from, to, delta);
  	},
  
  	check: function(){
  		if (!this.timer) return true;
  		switch (this.options.link){
  			case 'cancel': this.cancel(); return true;
  			case 'chain': this.chain(this.start.bind(this, arguments)); return false;
  		}
  		return false;
  	},
  
  	start: function(from, to){
  		if (!this.check(from, to)) return this;
  		this.from = from;
  		this.to = to;
  		this.time = 0;
  		this.startTimer();
  		this.onStart();
  		return this;
  	},
  
  	complete: function(){
  		return (!this.stopTimer()) ? this : this.onComplete();
  	},
  
  	cancel: function(){
  		return (!this.stopTimer()) ? this : this.onCancel();
  	},
  
  	onStart: function(){
  		return this.fireEvent('onStart', this.pass);
  	},
  
  	onComplete: function(){
  		return this.fireEvent('onComplete', this.pass).callChain();
  	},
  
  	onCancel: function(){
  		return this.fireEvent('onCancel', this.pass).clearChain();
  	},
  
  	pause: function(){
  		this.stopTimer();
  		return this;
  	},
  
  	resume: function(){
  		this.startTimer();
  		return this;
  	},
  
  	stopTimer: function(){
  		if (!this.timer) return false;
  		this.time = $time() - this.time;
  		this.timer = $clear(this.timer);
  		return true;
  	},
  
  	startTimer: function(){
  		if (this.timer) return false;
  		this.time = $time() - this.time;
  		this.timer = this.step.periodical(Math.round(1000 / this.options.fps), this);
  		return true;
  	}
  
  });
  
  Fx.compute = function(from, to, delta){
  	return (to - from) * delta + from;
  };
  
  Fx.Durations = {'short': 250, 'normal': 500, 'long': 1000};
  
  Fx.CSS = new Class({
  
  	Extends: Fx,
  
  	prepare: function(element, property, values){
  		values = $splat(values);
  		var values1 = values[1];
  		if (!$chk(values1)){
  			values[1] = values[0];
  			values[0] = element.getStyle(property);
  		}
  		var parsed = values.map(this.parse);
  		return {from: parsed[0], to: parsed[1]};
  	},
  
  	parse: function(value){
  		value = $lambda(value)();
  		value = (typeof value == 'string') ? value.split(' ') : $splat(value);
  		return value.map(function(val){
  			val = String(val);
  			var found = false;
  			Fx.CSS.Parsers.each(function(parser, key){
  				if (found) return;
  				var parsed = parser.parse(val);
  				if ($chk(parsed)) found = {'value': parsed, 'parser': parser};
  			});
  			found = found || {value: val, parser: Fx.CSS.Parsers.String};
  			return found;
  		});
  	},
  
  	compute: function(from, to, delta){
  		var computed = [];
  		(Math.min(from.length, to.length)).times(function(i){
  			computed.push({'value': from[i].parser.compute(from[i].value, to[i].value, delta), 'parser': from[i].parser});
  		});
  		computed.$family = {name: 'fx:css:value'};
  		return computed;
  	},
  
  	serve: function(value, unit){
  		if ($type(value) != 'fx:css:value') value = this.parse(value);
  		var returned = [];
  		value.each(function(bit){
  			returned = returned.concat(bit.parser.serve(bit.value, unit));
  		});
  		return returned;
  	},
  
  	render: function(element, property, value){
  		element.setStyle(property, this.serve(value, this.options.unit));
  	},
  
  	search: function(selector){
  		var to = {};
  		Array.each(document.styleSheets, function(sheet, j){
  			var rules = sheet.rules || sheet.cssRules;
  			Array.each(rules, function(rule, i){
  				if (!rule.style || !rule.selectorText || !rule.selectorText.test('^' + selector + '$')) return;
  				Element.Styles.each(function(value, style){
  					if (!rule.style[style] || Element.ShortStyles[style]) return;
  					value = rule.style[style];
  					to[style] = (value.test(/^rgb/)) ? value.rgbToHex() : value;
  				});
  			});
  		});
  		return to;
  	}
  
  });
  
  Fx.CSS.Parsers = new Hash({
  
  	Color: {
  
  		parse: function(value){
  			if (value.match(/^#[0-9a-f]{3,6}$/i)) return value.hexToRgb(true);
  			return ((value = value.match(/(\d+),\s*(\d+),\s*(\d+)/))) ? [value[1], value[2], value[3]] : false;
  		},
  
  		compute: function(from, to, delta){
  			return from.map(function(value, i){
  				return Math.round(Fx.compute(from[i], to[i], delta));
  			});
  		},
  
  		serve: function(value){
  			return value.map(Number);
  		}
  
  	},
  
  	Number: {
  
  		parse: function(value){
  			return parseFloat(value);
  		},
  
  		compute: function(from, to, delta){
  			return Fx.compute(from, to, delta);
  		},
  
  		serve: function(value, unit){
  			return (unit) ? value + unit : value;
  		}
  
  	},
  
  	String: {
  
  		parse: $lambda(false),
  
  		compute: $arguments(1),
  
  		serve: $arguments(0)
  
  	}
  
  });
  
  Fx.Tween = new Class({
  
  	Extends: Fx.CSS,
  
  	initialize: function(element, property, options){
  		this.element = this.pass = $(element);
  		this.property = property;
  		arguments.callee.parent(options);
  	},
  
  	set: function(now){
  		this.render(this.element, this.property, now);
  		return this;
  	},
  
  	start: function(){
  		var fromto = Array.slice(arguments);
  		if (!this.check(fromto)) return this;
  		var parsed = this.prepare(this.element, this.property, fromto);
  		return arguments.callee.parent(parsed.from, parsed.to);
  	}
  
  });
  
  Element.Properties.tween = {
  
  	set: function(options){
  		var tween = this.retrieve('tween');
  		if (tween) tween.cancel();
  		return this.store('tween', new Fx.Tween(this, null, $extend({link: 'cancel'}, options)));
  	},
  
  	get: function(property, options){
  		if (options || !this.retrieve('tween')) this.set('tween', options);
  		var tween = this.retrieve('tween');
  		tween.property = property;
  		return tween;
  	}
  
  };
  
  Element.implement({
  
  	tween: function(property){
  		var tween = this.get('tween', property);
  		tween.start.apply(tween, Array.slice(arguments, 1));
  		return this;
  	},
  
  	fade: function(how){
  		var fade = this.get('tween', 'opacity');
  		how = $pick(how, 'toggle');
  		switch (how){
  			case 'in': fade.start(1); break;
  			case 'out': fade.start(0); break;
  			case 'show': fade.set(1); break;
  			case 'hide': fade.set(0); break;
  			case 'toggle': fade.start((function(){
  				return (this.getStyle('visibility') == 'hidden') ? 1 : 0;
  			}).bind(this)); break;
  			default: fade.start.apply(fade, arguments);
  		}
  		return this;
  	},
  
  	highlight: function(start, end){
  		if (!end){
  			var style = this.getStyle('background-color');
  			end = (style == 'transparent') ? '#ffffff' : style;
  		}
  		this.get('tween', 'background-color').start(start || '#ffff88', end);
  		return this;
  	},
  
  	effect: function(property, options){
  		return new Fx.Tween(this, property, options);
  	}
  
  });
  
  Fx.Morph = new Class({
  
  	Extends: Fx.CSS,
  
  	initialize: function(element, options){
  		this.element = this.pass = $(element);
  		arguments.callee.parent(options);
  	},
  
  	set: function(now){
  		if (typeof now == 'string') now = this.search(now);
  		for (var p in now) this.render(this.element, p, now[p]);
  		return this;
  	},
  
  	compute: function(from, to, delta){
  		var now = {};
  		for (var p in from) now[p] = arguments.callee.parent(from[p], to[p], delta);
  		return now;
  	},
  
  	start: function(properties){
  		if (!this.check(properties)) return this;
  		if (typeof properties == 'string') properties = this.search(properties);
  		var from = {}, to = {};
  		for (var p in properties){
  			var parsed = this.prepare(this.element, p, properties[p]);
  			from[p] = parsed.from;
  			to[p] = parsed.to;
  		}
  		return arguments.callee.parent(from, to);
  	}
  
  });
  
  Element.Properties.morph = {
  
  	set: function(options){
  		var morph = this.retrieve('morph');
  		if (morph) morph.cancel();
  		return this.store('morph', new Fx.Morph(this, $extend({link: 'cancel'}, options)));
  	},
  
  	get: function(options){
  		if (options || !this.retrieve('morph')) this.set('morph', options);
  		return this.retrieve('morph');
  	}
  
  };
  
  Element.implement({
  
  	morph: function(props){
  		this.get('morph').start(props);
  		return this;
  	},
  
  	effects: function(options){
  		return new Fx.Morph(this, options);
  	}
  
  });
  
  Fx.Slide = new Class({
  
  	Extends: Fx,
  
  	options: {
  		mode: 'vertical'
  	},
  
  	initialize: function(element, options){
  		this.addEvent('onComplete', function(){
  			this.open = (this.wrapper['offset' + this.layout.capitalize()] != 0);
  			if (this.open){
  				this.wrapper.setStyle(this.layout, 'auto');
  				if (Browser.Engine.webkit419) this.element.dispose().inject(this.wrapper);
  			}
  		}, true);
  		this.element = this.pass = $(element);
  		arguments.callee.parent(options);
  		var wrapper = this.element.retrieve('wrapper');
  		this.wrapper = wrapper || new Element('div', {
  			styles: $extend(this.element.getStyles('margin', 'position'), {'overflow': 'hidden'})
  		}).wraps(this.element);
  		this.element.store('wrapper', this.wrapper).setStyle('margin', 0);
  		this.now = [];
  		this.open = true;
  	},
  
  	vertical: function(){
  		this.margin = 'margin-top';
  		this.layout = 'height';
  		this.offset = this.element.offsetHeight;
  	},
  
  	horizontal: function(){
  		this.margin = 'margin-left';
  		this.layout = 'width';
  		this.offset = this.element.offsetWidth;
  	},
  
  	set: function(now){
  		this.element.setStyle(this.margin, now[0]);
  		this.wrapper.setStyle(this.layout, now[1]);
  		return this;
  	},
  
  	compute: function(from, to, delta){
  		var now = [];
  		(2).times(function(i){
  			now[i] = Fx.compute(from[i], to[i], delta);
  		});
  		return now;
  	},
  
  	start: function(how, mode){
  		if (!this.check(how, mode)) return this;
  		this[mode || this.options.mode]();
  		var margin = this.element.getStyle(this.margin).toInt();
  		var layout = this.wrapper.getStyle(this.layout).toInt();
  		var caseIn = [[margin, layout], [0, this.offset]];
  		var caseOut = [[margin, layout], [-this.offset, 0]];
  		var start;
  		switch(how){
  			case 'in': start = caseIn; break;
  			case 'out': start = caseOut; break;
  			case 'toggle': start = (this.wrapper['offset' + this.layout.capitalize()] == 0) ? caseIn : caseOut;
  		}
  		return arguments.callee.parent(start[0], start[1]);
  	},
  
  	slideIn: function(mode){
  		return this.start('in', mode);
  	},
  
  	slideOut: function(mode){
  		return this.start('out', mode);
  	},
  
  	hide: function(mode){
  		this[mode || this.options.mode]();
  		this.open = false;
  		return this.set([-this.offset, 0]);
  	},
  
  	show: function(mode){
  		this[mode || this.options.mode]();
  		this.open = true;
  		return this.set([0, this.offset]);
  	},
  
  	toggle: function(mode){
  		return this.start('toggle', mode);
  	}
  
  });
  
  Element.Properties.slide = {
  
  	set: function(options){
  		var slide = this.retrieve('slide');
  		if (slide) slide.cancel();
  		return this.store('slide', new Fx.Slide(this, $extend({link: 'cancel'}, options)));
  	},
  
  	get: function(options){
  		if (options || !this.retrieve('slide')) this.set('slide', options);
  		return this.retrieve('slide');
  	}
  
  };
  
  Element.implement({
  
  	slide: function(how){
  		how = how || 'toggle';
  		var slide = this.get('slide');
  		switch(how){
  			case 'hide': slide.hide(); break;
  			case 'show': slide.show(); break;
  			default: slide.start(how);
  		}
  		return this;
  	}
  
  });
  
  Fx.Scroll = new Class({
  
  	Extends: Fx,
  
  	options: {
  		offset: {'x': 0, 'y': 0},
  		wheelStops: true
  	},
  
  	initialize: function(element, options){
  		this.element = this.pass = $(element);
  		arguments.callee.parent(options);
  		var cancel = this.cancel.bind(this, false);
  
  		if ($type(this.element) != 'element') this.element = $(this.element.getDocument().body);
  
  		var stopper = this.element;
  
  		if (this.options.wheelStops){
  			this.addEvent('onStart', function(){
  				stopper.addEvent('mousewheel', cancel);
  			}, true);
  			this.addEvent('onComplete', function(){
  				stopper.removeEvent('mousewheel', cancel);
  			}, true);
  		}
  	},
  
  	set: function(){
  		var now = Array.flatten(arguments);
  		this.element.scrollTo(now[0], now[1]);
  	},
  
  	compute: function(from, to, delta){
  		var now = [];
  		(2).times(function(i){
  			now.push(Fx.compute(from[i], to[i], delta));
  		});
  		return now;
  	},
  
  	start: function(x, y){
  		if (!this.check(x, y)) return this;
  		var offsetSize = this.element.getSize(), scrollSize = this.element.getScrollSize(), scroll = this.element.getScroll(), values = {'x': x, 'y': y};
  		for (var z in values){
  			var max = scrollSize[z] - offsetSize[z];
  			if ($chk(values[z])) values[z] = ($type(values[z]) == 'number') ? values[z].limit(0, max) : max;
  			else values[z] = scroll[z];
  			values[z] += this.options.offset[z];
  		}
  		return arguments.callee.parent([scroll.x, scroll.y], [values.x, values.y]);
  	},
  
  	toTop: function(){
  		return this.start(false, 0);
  	},
  
  	toLeft: function(){
  		return this.start(0, false);
  	},
  
  	toRight: function(){
  		return this.start('right', false);
  	},
  
  	toBottom: function(){
  		return this.start(false, 'bottom');
  	},
  
  	toElement: function(el){
  		var position = $(el).getPosition(this.element);
  		return this.start(position.x, position.y);
  	}
  
  });
  
  (function(){
  
  	var old = Fx.prototype.initialize;
  
  	Fx.prototype.initialize = function(options){
  		old.call(this, options);
  		var trans = this.options.transition;
  		if (typeof trans == 'string' && (trans = trans.split(':'))){
  			var base = Fx.Transitions;
  			base = base[trans[0]] || base[trans[0].capitalize()];
  			if (trans[1]) base = base['ease' + trans[1].capitalize() + (trans[2] ? trans[2].capitalize() : '')];
  			this.options.transition = base;
  		}
  	};
  
  })();
  
  Fx.Transition = function(transition, params){
  	params = $splat(params);
  	return $extend(transition, {
  		easeIn: function(pos){
  			return transition(pos, params);
  		},
  		easeOut: function(pos){
  			return 1 - transition(1 - pos, params);
  		},
  		easeInOut: function(pos){
  			return (pos <= 0.5) ? transition(2 * pos, params) / 2 : (2 - transition(2 * (1 - pos), params)) / 2;
  		}
  	});
  };
  
  Fx.Transitions = new Hash({
  
  	linear: $arguments(0)
  
  });
  
  Fx.Transitions.extend = function(transitions){
  	for (var transition in transitions) Fx.Transitions[transition] = new Fx.Transition(transitions[transition]);
  };
  
  Fx.Transitions.extend({
  
  	Pow: function(p, x){
  		return Math.pow(p, x[0] || 6);
  	},
  
  	Expo: function(p){
  		return Math.pow(2, 8 * (p - 1));
  	},
  
  	Circ: function(p){
  		return 1 - Math.sin(Math.acos(p));
  	},
  
  	Sine: function(p){
  		return 1 - Math.sin((1 - p) * Math.PI / 2);
  	},
  
  	Back: function(p, x){
  		x = x[0] || 1.618;
  		return Math.pow(p, 2) * ((x + 1) * p - x);
  	},
  
  	Bounce: function(p){
  		var value;
  		for (var a = 0, b = 1; 1; a += b, b /= 2){
  			if (p >= (7 - 4 * a) / 11){
  				value = - Math.pow((11 - 6 * a - 11 * p) / 4, 2) + b * b;
  				break;
  			}
  		}
  		return value;
  	},
  
  	Elastic: function(p, x){
  		return Math.pow(2, 10 * --p) * Math.cos(20 * p * Math.PI * (x[0] || 1) / 3);
  	}
  
  });
  
  ['Quad', 'Cubic', 'Quart', 'Quint'].each(function(transition, i){
  	Fx.Transitions[transition] = new Fx.Transition(function(p){
  		return Math.pow(p, [i + 2]);
  	});
  });
  
  var Request = new Class({
  
  	Implements: [Chain, Events, Options],
  
  	options: {/*
  		onRequest: $empty,
  		onSuccess: $empty,
  		onFailure: $empty,
  		onException: $empty,*/
  		url: '',
  		data: '',
  		headers: {},
  		async: true,
  		method: 'post',
  		link: 'ignore',
  		isSuccess: null,
  		emulation: true,
  		urlEncoded: true,
  		encoding: 'utf-8',
  		evalScripts: false,
  		evalResponse: false
  	},
  
  	getXHR: function(){
  		return (window.XMLHttpRequest) ? new XMLHttpRequest() : ((window.ActiveXObject) ? new ActiveXObject('Microsoft.XMLHTTP') : false);
  	},
  
  	initialize: function(options){
  		if (!(this.xhr = this.getXHR())) return;
  		this.setOptions(options);
  		this.options.isSuccess = this.options.isSuccess || this.isSuccess;
  		this.headers = new Hash(this.options.headers).extend({
  			'X-Requested-With': 'XMLHttpRequest',
  			'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
  		});
  	},
  
  	onStateChange: function(){
  		if (this.xhr.readyState != 4 || !this.running) return;
  		this.running = false;
  		this.status = 0;
  		$try(function(){
  			this.status = this.xhr.status;
  		}, this);
  		if (this.options.isSuccess.call(this, this.status)){
  			this.response = {text: this.xhr.responseText, xml: this.xhr.responseXML};
  			this.success(this.response.text, this.response.xml);
  		} else {
  			this.response = {text: null, xml: null};
  			this.failure();
  		}
  		this.xhr.onreadystatechange = $empty;
  	},
  
  	isSuccess: function(){
  		return ((this.status >= 200) && (this.status < 300));
  	},
  
  	processScripts: function(text){
  		if (this.options.evalResponse || (/(ecma|java)script/).test(this.getHeader('Content-type'))) return $exec(text);
  		return text.stripScripts(this.options.evalScripts);
  	},
  
  	success: function(text, xml){
  		this.onSuccess(this.processScripts(text), xml);
  	},
  
  	onSuccess: function(){
  		this.fireEvent('onComplete', arguments).fireEvent('onSuccess', arguments).callChain();
  	},
  
  	failure: function(){
  		this.onFailure();
  	},
  
  	onFailure: function(){
  		this.fireEvent('onComplete').fireEvent('onFailure', this.xhr);
  	},
  
  	setHeader: function(name, value){
  		this.headers.set(name, value);
  		return this;
  	},
  
  	getHeader: function(name){
  		return $try(function(){
  			return this.getResponseHeader(name);
  		}, this.xhr) || null;
  	},
  
  	check: function(){
  		if (!this.running) return true;
  		switch (this.options.link){
  			case 'cancel': this.cancel(); return true;
  			case 'chain': this.chain(this.send.bind(this, arguments)); return false;
  		}
  		return false;
  	},
  
  	send: function(options){
  		if (!this.check(options)) return this;
  		this.running = true;
  
  		var type = $type(options);
  		if (type == 'string' || type == 'element') options = {data: options};
  
  		var old = this.options;
  		options = $extend({data: old.data, url: old.url, method: old.method}, options);
  		var data = options.data, url = options.url, method = options.method;
  
  		switch($type(data)){
  			case 'element': data = $(data).toQueryString(); break;
  			case 'object': case 'hash': data = Hash.toQueryString(data);
  		}
  
  		if (this.options.emulation && ['put', 'delete'].contains(method)){
  			var _method = '_method=' + method;
  			data = (data) ? _method + '&' + data : _method;
  			method = 'post';
  		}
  
  		if (this.options.urlEncoded && method == 'post'){
  			var encoding = (this.options.encoding) ? '; charset=' + this.options.encoding : '';
  			this.headers.set('Content-type', 'application/x-www-form-urlencoded' + encoding);
  		}
  
  		if (data && method == 'get'){
  			url = url + (url.contains('?') ? '&' : '?') + data;
  			data = null;
  		}
  
  		this.xhr.open(method.toUpperCase(), url, this.options.async);
  
  		this.xhr.onreadystatechange = this.onStateChange.bind(this);
  
  		this.headers.each(function(value, key){
  			try{
  				this.xhr.setRequestHeader(key, value);
  			} catch(e){
  				this.fireEvent('onException', [e, key, value]);
  			}
  		}, this);
  
  		this.fireEvent('onRequest');
  		this.xhr.send(data);
  		if (!this.options.async) this.onStateChange();
  		return this;
  	},
  
  	cancel: function(){
  		if (!this.running) return this;
  		this.running = false;
  		this.xhr.abort();
  		this.xhr.onreadystatechange = $empty;
  		this.xhr = this.getXHR();
  		this.fireEvent('onCancel');
  		return this;
  	}
  
  });
  
  (function(){
  
  var methods = {};
  ['get', 'post', 'GET', 'POST', 'PUT', 'DELETE'].each(function(method){
  	methods[method] = function(){
  		var params = Array.link(arguments, {url: String.type, data: $defined});
  		return this.send($extend(params, {method: method.toLowerCase()}));
  	};
  });
  
  Request.implement(methods);
  
  })();
  
  Element.Properties.send = {
  
  	get: function(options){
  		if (options || !this.retrieve('send')) this.set('send', options);
  		return this.retrieve('send');
  	},
  
  	set: function(options){
  		var send = this.retrieve('send');
  		if (send) send.cancel();
  		return this.store('send', new Request($extend({
  			data: this, link: 'cancel', method: this.get('method') || 'post', url: this.get('action')
  		}, options)));
  	}
  
  };
  
  Element.implement({
  
  	send: function(url){
  		var sender = this.get('send');
  		sender.send({data: this, url: url || sender.options.url});
  		return this;
  	}
  
  });
  
  Request.HTML = new Class({
  
  	Extends: Request,
  
  	options: {
  		update: false,
  		evalScripts: true,
		filter: false
	},

	processHTML: function(text){
		var match = text.match(/<body[^>]*>([\s\S]*?)<\/body>/i);
		return (match) ? match[1] : text;
	},

	success: function(text){
		var opts = this.options, res = this.response;
		res.html = this.processHTML(text).stripScripts(function(script){
			res.javascript = script;
		});
		var node = new Element('div', {html: res.html});
		res.elements = node.getElements('*');
		res.tree = (opts.filter) ? res.elements.filterBy(opts.filter) : $A(node.childNodes).filter(function(el){
			return ($type(el) != 'whitespace');
		});
		if (opts.update) $(opts.update).empty().adopt(res.tree);
		if (opts.evalScripts) $exec(res.javascript);
		this.onSuccess(res.tree, res.elements, res.html, res.javascript);
	}

});

Element.Properties.load = {

	get: function(options){
		if (options || !this.retrieve('load')) this.set('load', options);
		return this.retrieve('load');
	},

	set: function(options){
		var load = this.retrieve('load');
		if (load) load.cancel();
		return this.store('load', new Request.HTML($extend({link: 'cancel', update: this, method: 'get'}, options)));
	}

};

Element.implement({

	load: function(){
		this.get('load').send(Array.link(arguments, {data: Object.type, url: String.type}));
		return this;
	}

});

var Drag = new Class({

	Implements: [Events, Options],

	options: {/*
		onBeforeStart: $empty,
		onStart: $empty,
		onDrag: $empty,
		onCancel: $empty,
		onComplete: $empty,*/
		snap: 6,
		unit: 'px',
		grid: false,
		limit: false,
		handle: false,
		modifiers: {x: 'left', y: 'top'}
	},

	initialize: function(){
		var params = Array.link(arguments, {'options': Object.type, 'element': $defined});
		this.element = $(params.element);
		this.document = this.element.getDocument();
		this.setOptions(params.options || {});
		var htype = $type(this.options.handle);
		this.handles = (htype == 'array' || htype == 'collection') ? $$(this.options.handle) : $(this.options.handle) || this.element;
		this.mouse = {'now': {}, 'pos': {}};
		this.value = {'start': {}, 'now': {}};

		this.selection = (Browser.Engine.trident) ? 'selectstart' : 'mousedown';

		this.bound = {
			start: this.start.bind(this),
			check: this.check.bind(this),
			drag: this.drag.bind(this),
			stop: this.stop.bind(this),
			cancel: this.cancel.bind(this),
			eventStop: $lambda(false)
		};
		this.attach();
	},

	attach: function(){
		this.handles.addEvent('mousedown', this.bound.start);
		return this;
	},

	detach: function(){
		this.handles.removeEvent('mousedown', this.bound.start);
		return this;
	},

	start: function(event){
		this.fireEvent('onBeforeStart', this.element);
		this.mouse.start = event.page;
		var limit = this.options.limit;
		this.limit = {'x': [], 'y': []};
		for (var z in this.options.modifiers){
			if (!this.options.modifiers[z]) continue;
			this.value.now[z] = this.element.getStyle(this.options.modifiers[z]).toInt();
			this.mouse.pos[z] = event.page[z] - this.value.now[z];
			if (limit && limit[z]){
				for (var i = 2; i--; i){
					if ($chk(limit[z][i])) this.limit[z][i] = $lambda(limit[z][i])();
				}
			}
		}
		if ($type(this.options.grid) == 'number') this.options.grid = {'x': this.options.grid, 'y': this.options.grid};
		this.document.addEvents({mousemove: this.bound.check, mouseup: this.bound.cancel});
		this.document.addEvent(this.selection, this.bound.eventStop);
	},

	check: function(event){
		var distance = Math.round(Math.sqrt(Math.pow(event.page.x - this.mouse.start.x, 2) + Math.pow(event.page.y - this.mouse.start.y, 2)));
		if (distance > this.options.snap){
			this.cancel();
			this.document.addEvents({
				mousemove: this.bound.drag,
				mouseup: this.bound.stop
			});
			this.fireEvent('onStart', this.element).fireEvent('onSnap', this.element);
		}
	},

	drag: function(event){
		this.mouse.now = event.page;
		for (var z in this.options.modifiers){
			if (!this.options.modifiers[z]) continue;
			this.value.now[z] = this.mouse.now[z] - this.mouse.pos[z];
			if (this.options.limit && this.limit[z]){
				if ($chk(this.limit[z][1]) && (this.value.now[z] > this.limit[z][1])){
					this.value.now[z] = this.limit[z][1];
				} else if ($chk(this.limit[z][0]) && (this.value.now[z] < this.limit[z][0])){
					this.value.now[z] = this.limit[z][0];
				}
			}
			if (this.options.grid[z]) this.value.now[z] -= (this.value.now[z] % this.options.grid[z]);
			this.element.setStyle(this.options.modifiers[z], this.value.now[z] + this.options.unit);
		}
		this.fireEvent('onDrag', this.element);
	},

	cancel: function(event){
		this.document.removeEvent('mousemove', this.bound.check);
		this.document.removeEvent('mouseup', this.bound.cancel);
		if (event){
			this.document.removeEvent(this.selection, this.bound.eventStop);
			this.fireEvent('onCancel', this.element);
		}
	},

	stop: function(event){
		this.document.removeEvent(this.selection, this.bound.eventStop);
		this.document.removeEvent('mousemove', this.bound.drag);
		this.document.removeEvent('mouseup', this.bound.stop);
		if (event) this.fireEvent('onComplete', this.element);
	}

});

Element.implement({

	makeResizable: function(options){
		return new Drag(this, $merge({modifiers: {'x': 'width', 'y': 'height'}}, options));
	}

});

Drag.Move = new Class({

	Extends: Drag,

	options: {
		droppables: [],
		container: false
	},

	initialize: function(element, options){
		arguments.callee.parent(element, options);
		this.droppables = $$(this.options.droppables);
		this.container = $(this.options.container);
		var position = (this.element.positioned()) ? this.element.getStyle('position') : 'absolute';
		this.element.position(this.element.getRelativePosition()).setStyle('position', position);
	},

	start: function(event){
		if (this.overed){
			this.overed.fireEvent('leave', [this.element, this]);
			this.overed = null;
		}
		if (this.container){
			var el = this.element, cont = this.container, ccoo = cont.getCoordinates(el.getOffsetParent()), cps = {}, ems = {};

			['top', 'right', 'bottom', 'left'].each(function(pad){
				cps[pad] = cont.getStyle('padding-' + pad).toInt();
				ems[pad] = el.getStyle('margin-' + pad).toInt();
			}, this);

			var width = el.offsetWidth + ems.left + ems.right, height = el.offsetHeight + ems.top + ems.bottom;
			var x = [ccoo.left + cps.left, ccoo.right - cps.right - width];
			var y = [ccoo.top + cps.top, ccoo.bottom - cps.bottom - height];

			this.options.limit = {x: x, y: y};
		}
		arguments.callee.parent(event);
	},

	checkAgainst: function(el){
		el = el.getCoordinates();
		var now = this.mouse.now;
		return (now.x > el.left && now.x < el.right && now.y < el.bottom && now.y > el.top);
	},

	checkDroppables: function(){
		var overed = this.droppables.filter(this.checkAgainst, this).getLast();
		if (this.overed != overed){
			if (this.overed) this.overed.fireEvent('leave', [this.element, this]);
			this.overed = overed ? overed.fireEvent('over', [this.element, this]) : null;
		}
	},

	drag: function(event){
		arguments.callee.parent(event);
		if (this.droppables.length) this.checkDroppables();
	},

	stop: function(event){
		this.checkDroppables();
		if (this.overed) this.overed.fireEvent('drop', [this.element, this]);
		else this.element.fireEvent('emptydrop', this);
		return arguments.callee.parent(event);
	}

});

Element.implement({

	makeDraggable: function(options){
		return new Drag.Move(this, options);
	}

});

Selectors.Pseudo.children = {

	parser: function(argument){
		argument = (argument) ? argument.match(/^([-+]?\d*)?([\-+:])?([-+]?\d*)?$/) : [null, 0, false, 0];
		if (!argument) return false;
		argument[1] = parseInt(argument[1]) || 0;
		var int1 = parseInt(argument[3]);
		argument[3] = ($chk(int1)) ? int1 : 0;
		switch (argument[2]){
			case '-': case '+': case ':': return {'a': argument[1], 'b': argument[3], 'special': argument[2]};
			default: return {'a': argument[1], 'b': 0, 'special': 'index'};
		}
	},

	xpath: function(argument){
		var include = '';
		var len = 'count(../child::*)';
		var a = argument.a + ' + ' + ((argument.a < 0) ? len : 0);
		var b = argument.b + ' + ' + ((argument.b < 0) ? len : 0);
		var pos = 'position()';
		switch (argument.special){
			case '-':
				b = '((' + a + ' - ' + b + ') mod (' + len + '))';
				a += ' + 1';
				b += ' + 1';
				include = '(' + b + ' < 1 and (' + pos + ' <= ' + a + ' or ' + pos + ' >= (' + b + ' + ' + len + ')' + ')) or (' + pos + ' <= ' + a + ' and ' + pos + ' >= ' + b + ')';
			break;
			case '+': b = '((' + a + ' + ' + b + ') mod ( ' + len + '))';
			case ':':
				a += ' + 1';
				b += ' + 1';
				include = '(' + b + ' < ' + a + ' and (' + pos + ' >= ' + a + ' or ' + pos + ' <= ' + b + ')) or (' + pos + ' >= ' + a + ' and ' + pos + ' <= ' + b + ')';
			break;
			default: include = (a + ' + 1');
		}
		return '[' + include + ']';
	},

	filter: function(argument, Local){
		Local.i = Local.i || 0;
		Local.all = Local.all || this.parentNode.childNodes;
		Local.len = Local.len || Local.all.length;
		var i = Local.i;
		var len = Local.len;
		var all = Local.all;
		var include = false;
		var a = argument.a + ((argument.a < 0) ? len : 0);
		var b = argument.b + ((argument.b < 0) ? len : 0);
		switch (argument.special){
			case '-':
				b = (a - b) % len;
				include = (b < 0) ? (i <= a || i >= (b + len)) : (i <= a && i >= b);
			break;
			case '+': b = (b + a) % len;
			case ':': include = (b < a) ? (i >= a || i <= b) : (i >= a && i <= b); break;
			default: include = (all[a] == this);
		}
		Local.i++;
		return include;
	}
};

var Sortables = new Class({

	Implements: [Events, Options],

	options: {/*
		onSort: $empty,
		onStart: $empty,
		onComplete: $empty,*/
		snap: 4,
		handle: false,
		revert: false,
		constrain: false,
		cloneOpacity: 0.7,
		elementOpacity: 0.3
	},

	initialize: function(lists, options){
		this.setOptions(options);
		this.elements = [];
		this.lists = [];
		this.idle = true;

		this.addLists($$($(lists) || lists));
		if (this.options.revert) this.effect = new Fx.Morph(null, $merge({duration: 250, link: 'cancel'}, this.options.revert));
	},

	attach: function(){
		this.addLists(this.lists);
		return this;
	},

	detach: function(){
		this.lists = this.removeLists(this.lists);
		return this;
	},

	addItems: function(){
		Array.flatten(arguments).each(function(element){
			this.elements.push(element);
			var start = element.retrieve('sortables:start', this.start.bindWithEvent(this, element));
			var insert = element.retrieve('sortables:insert', this.insert.bind(this, element));
			(this.options.handle ? element.getElement(this.options.handle) || element : element).addEvent('mousedown', start);
			element.addEvent('over', insert);
		}, this);
		return this;
	},

	addLists: function(){
		Array.flatten(arguments).each(function(list){
			this.lists.push(list);
			this.addItems(list.getChildren());
			list.addEvent('over', list.retrieve('sortables:insert', this.insert.bind(this, [list, 'inside'])));
		}, this);
		return this;
	},

	removeItems: function(){
		var elements = [];
		Array.flatten(arguments).each(function(element){
			elements.push(element);
			this.elements.remove(element);
			var start = element.retrieve('sortables:start');
			var insert = element.retrieve('sortables:insert');
			(this.options.handle ? element.getElement(this.options.handle) || element : element).removeEvent('mousedown', start);
			element.removeEvent('over', insert);
		}, this);
		return elements;
	},

	removeLists: function(){
		var lists = [];
		Array.flatten(arguments).each(function(list){
			lists.push(list);
			this.lists.remove(list);
			this.removeItems(list.getChildren());
			list.removeEvent('over', list.retrieve('sortables:insert'));
		}, this);
		return lists;
	},

	getClone: function(element){
		return element.clone(true).setStyles({
			'margin': '0px',
			'position': 'absolute',
			'visibility': 'hidden'
		}).inject(this.list).position(element.getRelativePosition());
	},

	getDroppables: function(){
		var droppables = this.list.getChildren();
		if (!this.options.constrain) droppables = this.lists.concat(droppables).remove(this.list);
		return droppables.remove(this.clone).remove(this.element);
	},

	insert: function(element, where){
		if (where) {
			this.list = element;
			this.drag.droppables = this.getDroppables();
		}
		where = where || (this.element.getAllPrevious().contains(element) ? 'before' : 'after');
		this.element.inject(element, where);
		this.fireEvent('onSort', [this.element, this.clone]);
	},

	start: function(event, element){
		if (!this.idle) return;
		this.idle = false;

		this.element = element;
		this.opacity = element.get('opacity');
		this.list = element.getParent();
		this.clone = this.getClone(element);

		this.drag = this.clone.makeDraggable({
			snap: this.options.snap,
			container: this.options.constrain && this.clone.getParent(),
			droppables: this.getDroppables(),
			onStart: function(){
				event.stop();
				this.clone.set('opacity', this.options.cloneOpacity);
				this.element.set('opacity', this.options.elementOpacity);
				this.fireEvent('onStart', [this.element, this.clone]);
			}.bind(this),
			onCancel: this.reset.bind(this),
			onComplete: this.end.bind(this)
		});

		this.drag.start(event);
	},

	end: function(){
		this.element.set('opacity', this.opacity);
		this.drag.detach();
		if (this.effect){
			var dim = this.element.getStyles('width', 'height');
			var pos = this.clone.computePosition(this.element.getPosition(this.clone.offsetParent), this.clone.getParent().positioned());
			this.effect.element = this.clone;
			this.effect.start({
				'top': pos.top,
				'left': pos.left,
				'width': dim.width,
				'height': dim.height,
				'opacity': 0.25
			}).chain(this.reset.bind(this));
		} else {
			this.reset();
		}
	},

	reset: function(){
		this.idle = true;
		this.clone.destroy();
		this.fireEvent('onComplete', this.element);
	},

	serialize: function(index, modifier){
		var serial = this.lists.map(function(list){
			return list.getChildren().map(modifier || function(element, index){
				return element.get('id');
			}, this);
		}, this);

		if (this.lists.length == 1) index = 0;
		return $chk(index) && index >= 0 && index < this.lists.length ? serial[index] : serial;
	}

});

var Tips = new Class({

	Implements: [Events, Options],

	options: {
		onShow: function(tip){
			tip.setStyle('visibility', 'visible');
		},
		onHide: function(tip){
			tip.setStyle('visibility', 'hidden');
		},
		maxTitleChars: 30,
		showDelay: 100,
		hideDelay: 100,
		className: 'tool',
		offsets: {'x': 16, 'y': 16},
		fixed: false
	},

	initialize: function(elements, options){
		this.setOptions(options);
		elements = $$(elements);
		this.document = (elements.length) ? elements[0].ownerDocument : document;
		this.toolTip = new Element('div', {
			'class': this.options.className + '-tip',
			'styles': {
				'position': 'absolute',
				'top': '0',
				'left': '0',
				'visibility': 'hidden'
			}
		}, this.document).inject(this.document.body);
		this.wrapper = new Element('div').inject(this.toolTip);
		elements.each(this.build, this);
	},

	build: function(el){
		el.$attributes.myTitle = (el.href && el.get('tag') == 'a') ? el.href.replace('http://', '') : (el.rel || false);
		if (el.title){
			var dual = el.title.split('::');
			if (dual.length > 1){
				el.$attributes.myTitle = dual[0].trim();
				el.$attributes.myText = dual[1].trim();
			} else {
				el.$attributes.myText = el.title;
			}
			el.removeProperty('title');
		} else {
			el.$attributes.myText = false;
		}
		if (el.$attributes.myTitle && el.$attributes.myTitle.length > this.options.maxTitleChars)
			el.$attributes.myTitle = el.$attributes.myTitle.substr(0, this.options.maxTitleChars - 1) + "&hellip;";
		el.addEvent('mouseenter', function(event){
			this.start(el);
			if (!this.options.fixed) this.locate(event);
			else this.position(el);
		}.bind(this));
		if (!this.options.fixed) el.addEvent('mousemove', this.locate.bind(this));
		var end = this.end.bind(this);
		el.addEvent('mouseleave', end);
	},

	start: function(el){
		this.wrapper.empty();
		if (el.$attributes.myTitle){
			this.title = new Element('span').inject(
				new Element('div', {'class': this.options.className + '-title'}
			).inject(this.wrapper)).set('html', el.$attributes.myTitle);
		}
		if (el.$attributes.myText){
			this.text = new Element('span').inject(
				new Element('div', {'class': this.options.className + '-text'}
			).inject(this.wrapper)).set('html', el.$attributes.myText);
		}
		$clear(this.timer);
		this.timer = this.show.delay(this.options.showDelay, this);
	},

	end: function(event){
		$clear(this.timer);
		this.timer = this.hide.delay(this.options.hideDelay, this);
	},

	position: function(element){
		var pos = element.getPosition();
		this.toolTip.setStyles({
			'left': pos.x + this.options.offsets.x,
			'top': pos.y + this.options.offsets.y
		});
	},

	locate: function(event){
		var doc = this.document.getSize();
		var scroll = this.document.getScroll();
		var tip = {'x': this.toolTip.offsetWidth, 'y': this.toolTip.offsetHeight};
		var prop = {'x': 'left', 'y': 'top'};
		for (var z in prop){
			var pos = event.page[z] + this.options.offsets[z];
			if ((pos + tip[z] - scroll[z]) > doc[z]) pos = event.page[z] - this.options.offsets[z] - tip[z];
			this.toolTip.setStyle(prop[z], pos);
		}
	},

	show: function(){
		if (this.options.timeout) this.timer = this.hide.delay(this.options.timeout, this);
		this.fireEvent('onShow', [this.toolTip]);
	},

	hide: function(){
		this.fireEvent('onHide', [this.toolTip]);
	}

});

var SmoothScroll = new Class({

	Extends: Fx.Scroll,

	initialize: function(options, element){
		element = $(element);
		var doc = element.getDocument(), win = element.getWindow();
		arguments.callee.parent(doc, options);
		this.links = (this.options.links) ? $$(this.options.links) : $$(doc.links);
		var location = win.location.href.match(/^[^#]*/)[0] + '#';
		this.links.each(function(link){
			if (link.href.indexOf(location) != 0) return;
			var anchor = link.href.substr(location.length);
			if (anchor && $(anchor)) this.useLink(link, anchor);
		}, this);
		if (!Browser.Engine.webkit419) this.addEvent('onComplete', function(){
			win.location.hash = this.anchor;
		}, true);
	},

	useLink: function(link, anchor){
		link.addEvent('click', function(event){
			this.anchor = anchor;
			this.toElement(anchor);
			event.stop();
		}.bind(this));
	}

});

var Slider = new Class({

	Implements: [Events, Options],

	options: {/*
		onChange: $empty,
		onComplete: $empty,*/
		onTick: function(position){
			if(this.options.snap) position = this.toPosition(this.step);
			this.knob.setStyle(this.property, position);
		},
		snap: false,
		offset: 0,
		range: false,
		wheel: false,
		steps: 100,
		mode: 'horizontal'
	},

	initialize: function(element, knob, options){
		this.setOptions(options);
		this.element = $(element);
		this.knob = $(knob);
		this.previousChange = this.previousEnd = this.step = -1;
		this.element.addEvent('mousedown', this.clickedElement.bind(this));
		if (this.options.wheel) this.element.addEvent('mousewheel', this.scrolledElement.bindWithEvent(this));
		var offset, limit = {}, modifiers = {'x': false, 'y': false};
		switch (this.options.mode){
			case 'vertical':
				this.axis = 'y';
				this.property = 'top';
				offset = 'offsetHeight';
				break;
			case 'horizontal':
				this.axis = 'x';
				this.property = 'left';
				offset = 'offsetWidth';
		}
		this.half = this.knob[offset] / 2;
		this.full = this.element[offset] - this.knob[offset] + (this.options.offset * 2);
		this.min = $chk(this.options.range[0]) ? this.options.range[0] : 0;
		this.max = $chk(this.options.range[1]) ? this.options.range[1] : this.options.steps;
		this.range = this.max - this.min;
		this.steps = this.options.steps || this.full;
		this.stepSize = Math.abs(this.range) / this.steps;
		this.stepWidth = this.stepSize * this.full / Math.abs(this.range) ;

		this.knob.setStyle('position', 'relative').setStyle(this.property, - this.options.offset);
		modifiers[this.axis] = this.property;
		limit[this.axis] = [- this.options.offset, this.full - this.options.offset];
		this.drag = new Drag(this.knob, {
			snap: 0,
			limit: limit,
			modifiers: modifiers,
			onDrag: this.draggedKnob.bind(this),
			onStart: this.draggedKnob.bind(this),
			onComplete: function(){
				this.draggedKnob();
				this.end();
			}.bind(this)
		});
		if (this.options.snap) {
			this.drag.options.grid = Math.ceil(this.stepWidth);
			this.drag.options.limit[this.axis][1] = this.full;
		}
	},

	set: function(step){
		if (!((this.range > 0) ^ (step < this.min))) step = this.min;
		if (!((this.range > 0) ^ (step > this.max))) step = this.max;

		this.step = Math.round(step);
		this.checkStep();
		this.end();
		this.fireEvent('onTick', this.toPosition(this.step));
		return this;
	},

	clickedElement: function(event){
		var dir = this.range < 0 ? -1 : 1;
		var position = event.page[this.axis] - this.element.getRelativePosition()[this.axis] - this.half;
		position = position.limit(-this.options.offset, this.full -this.options.offset);

		this.step = Math.round(this.min + dir * this.toStep(position));
		this.checkStep();
		this.end();
		this.fireEvent('onTick', position);
	},

	scrolledElement: function(event){
		var mode = (this.options.mode == 'horizontal') ? (event.wheel < 0) : (event.wheel > 0);
		this.set(mode ? this.step - this.stepSize : this.step + this.stepSize);
		event.stop();
	},

	draggedKnob: function(){
		var dir = this.range < 0 ? -1 : 1;
		var position = this.drag.value.now[this.axis];
		position = position.limit(-this.options.offset, this.full -this.options.offset);
		this.step = Math.round(this.min + dir * this.toStep(position));
		this.checkStep();
	},

	checkStep: function(){
		if (this.previousChange != this.step){
			this.previousChange = this.step;
			this.fireEvent('onChange', this.step);
		}
	},

	end: function(){
		if (this.previousEnd !== this.step){
			this.previousEnd = this.step;
			this.fireEvent('onComplete', this.step + '');
		}
	},

	toStep: function(position){
		var step = (position + this.options.offset) * this.stepSize / this.full * this.steps;
		return this.options.steps ? Math.round(step -= step % this.stepSize) : step;
	},

	toPosition: function(step){
		return (this.full * Math.abs(this.min - step)) / (this.steps * this.stepSize) - this.options.offset;
	}

});

var Scroller = new Class({

	Implements: [Events, Options],

	options: {
		area: 20,
		velocity: 1,
		onChange: function(x, y){
			this.element.scrollTo(x, y);
		}
	},

	initialize: function(element, options){
		this.setOptions(options);
		this.element = $(element);
		this.listener = ($type(this.element) != 'element') ? $(this.element.getDocument().body) : this.element;
		this.timer = null;
	},

	start: function(){
		this.coord = this.getCoords.bind(this);
		this.listener.addEvent('mousemove', this.coord);
	},

	stop: function(){
		this.listener.removeEvent('mousemove', this.coord);
		this.timer = $clear(this.timer);
	},

	getCoords: function(event){
		this.page = (this.listener.get('tag') == 'body') ? event.client : event.page;
		if (!this.timer) this.timer = this.scroll.periodical(50, this);
	},

	scroll: function(){
		var size = this.element.getSize(), scroll = this.element.getScroll(), pos = this.element.getPosition(), change = {'x': 0, 'y': 0};
		for (var z in this.page){
			if (this.page[z] < (this.options.area + pos[z]) && scroll[z] != 0)
				change[z] = (this.page[z] - this.options.area - pos[z]) * this.options.velocity;
			else if (this.page[z] + this.options.area > (size[z] + pos[z]) && size[z] + size[z] != scroll[z])
				change[z] = (this.page[z] - size[z] + this.options.area - pos[z]) * this.options.velocity;
		}
		if (change.y || change.x) this.fireEvent('onChange', [scroll.x + change.x, scroll.y + change.y]);
	}

});

var Asset = new Hash({

	javascript: function(source, properties){
		properties = $extend({
			onload: $empty,
			document: document,
			check: $lambda(true)
		}, properties);

		var script = new Element('script', {'src': source, 'type': 'text/javascript'});

		var load = properties.onload.bind(script), check = properties.check, doc = properties.document;
		delete properties.onload; delete properties.check; delete properties.document;

		script.addEvents({
			load: load,
			readystatechange: function(){
				if (this.readyState == 'complete') load();
			}
		}).setProperties(properties);
		if (Browser.Engine.webkit419) var checker = (function(){
			if (!$try(check)) return;
			$clear(checker);
			load();
		}).periodical(50);

		return script.inject(doc.head);
	},

	css: function(source, properties){
		return new Element('link', $merge({
			'rel': 'stylesheet', 'media': 'screen', 'type': 'text/css', 'href': source
		}, properties)).inject(document.head);
	},

	image: function(source, properties){
		properties = $merge({
			'onload': $empty,
			'onabort': $empty,
			'onerror': $empty
		}, properties);
		var image = new Image();
		var element = $(image) || new Element('img');
		['load', 'abort', 'error'].each(function(name){
			var type = 'on' + name;
			var event = properties[type];
			delete properties[type];
			image[type] = function(){
				if (!image) return;
				if (!element.parentNode){
					element.width = image.width;
					element.height = image.height;
				}
				image = image.onload = image.onabort = image.onerror = null;
				event.delay(1, element, element);
				element.fireEvent(name, element, 1);
			};
		});
		image.src = element.src = source;
		if (image && image.complete) image.onload.delay(1);
		return element.setProperties(properties);
	},

	images: function(sources, options){
		options = $merge({
			onComplete: $empty,
			onProgress: $empty
		}, options);
		if (!sources.push) sources = [sources];
		var images = [];
		var counter = 0;
		sources.each(function(source){
			var img = new Asset.image(source, {
				'onload': function(){
					options.onProgress.call(this, counter, sources.indexOf(source));
					counter++;
					if (counter == sources.length) options.onComplete();
				}
			});
			images.push(img);
		});
		return new Elements(images);
	}

});

Fx.Elements = new Class({

	Extends: Fx.CSS,

	initialize: function(elements, options){
		this.elements = this.pass = $$(elements);
		arguments.callee.parent(options);
	},

	compute: function(from, to, delta){
		var now = {};
		for (var i in from){
			var iFrom = from[i], iTo = to[i], iNow = now[i] = {};
			for (var p in iFrom) iNow[p] = arguments.callee.parent(iFrom[p], iTo[p], delta);
		}
		return now;
	},

	set: function(now){
		for (var i in now){
			var iNow = now[i];
			for (var p in iNow) this.render(this.elements[i], p, iNow[p]);
		}
		return this;
	},

	start: function(obj){
		if (!this.check(obj)) return this;
		var from = {}, to = {};
		for (var i in obj){
			var iProps = obj[i], iFrom = from[i] = {}, iTo = to[i] = {};
			for (var p in iProps){
				var parsed = this.prepare(this.elements[i], p, iProps[p]);
				iFrom[p] = parsed.from;
				iTo[p] = parsed.to;
			}
		}
		return arguments.callee.parent(from, to);
	}

});

var Accordion = new Class({

	Extends: Fx.Elements,

	options: {/*
		onActive: $empty,
		onBackground: $empty,*/
		display: 0,
		show: false,
		height: true,
		width: false,
		opacity: true,
		fixedHeight: false,
		fixedWidth: false,
		wait: false,
		alwaysHide: false
	},

	initialize: function(){
		var params = Array.link(arguments, {'container': Element.type, 'options': Object.type, 'togglers': $defined, 'elements': $defined});
		arguments.callee.parent(params.elements, params.options);
		this.togglers = $$(params.togglers);
		this.container = $(params.container);
		this.previous = -1;
		if (this.options.alwaysHide) this.options.wait = true;
		if ($chk(this.options.show)){
			this.options.display = false;
			this.previous = this.options.show;
		}
		if (this.options.start){
			this.options.display = false;
			this.options.show = false;
		}
		this.effects = {};
		if (this.options.opacity) this.effects.opacity = 'fullOpacity';
		if (this.options.width) this.effects.width = this.options.fixedWidth ? 'fullWidth' : 'offsetWidth';
		if (this.options.height) this.effects.height = this.options.fixedHeight ? 'fullHeight' : 'scrollHeight';
		for (var i = 0, l = this.togglers.length; i < l; i++) this.addSection(this.togglers[i], this.elements[i]);
		this.elements.each(function(el, i){
			if (this.options.show === i){
				this.fireEvent('onActive', [this.togglers[i], el]);
			} else {
				for (var fx in this.effects) el.setStyle(fx, 0);
			}
		}, this);
		if ($chk(this.options.display)) this.display(this.options.display);
	},

	addSection: function(toggler, element, pos){
		toggler = $(toggler);
		element = $(element);
		var test = this.togglers.contains(toggler);
		var len = this.togglers.length;
		this.togglers.include(toggler);
		this.elements.include(element);
		if (len && (!test || pos)){
			pos = $pick(pos, len - 1);
			toggler.inject(this.togglers[pos], 'before');
			element.inject(toggler, 'after');
		} else if (this.container && !test){
			toggler.inject(this.container);
			element.inject(this.container);
		}
		var idx = this.togglers.indexOf(toggler);
		toggler.addEvent('click', this.display.bind(this, idx));
		if (this.options.height) element.setStyles({'padding-top': 0, 'border-top': 'none', 'padding-bottom': 0, 'border-bottom': 'none'});
		if (this.options.width) element.setStyles({'padding-left': 0, 'border-left': 'none', 'padding-right': 0, 'border-right': 'none'});
		element.fullOpacity = 1;
		if (this.options.fixedWidth) element.fullWidth = this.options.fixedWidth;
		if (this.options.fixedHeight) element.fullHeight = this.options.fixedHeight;
		element.setStyle('overflow', 'hidden');
		if (!test){
			for (var fx in this.effects) element.setStyle(fx, 0);
		}
		return this;
	},

	display: function(index){
		index = ($type(index) == 'element') ? this.elements.indexOf(index) : index;
		if ((this.timer && this.options.wait) || (index === this.previous && !this.options.alwaysHide)) return this;
		this.previous = index;
		var obj = {};
		this.elements.each(function(el, i){
			obj[i] = {};
			var hide = (i != index) || (this.options.alwaysHide && (el.offsetHeight > 0));
			this.fireEvent(hide ? 'onBackground' : 'onActive', [this.togglers[i], el]);
			for (var fx in this.effects) obj[i][fx] = hide ? 0 : el[this.effects[fx]];
		}, this);
		return this.start(obj);
	}

});