var mootabs = new Class({
		Implements: [Options, Events],
		options: {
			width:			  '100%',
			height:			 '650px',
			changeTransition:       Fx.Transitions.Bounce.easeOut,
			duration:		       1000,
			mouseOverClass:	 'active',	
			activateOnLoad:	 'first',
			useAjax:			true,
			ajaxUrl:			'',
			ajaxOptions:	    { method:'get' },
			ajaxLoadingText:	'Loading...'
		},
	       
		initialize: function(element, options) {
			this.setOptions(options);
			this.el = $(element);
			this.elid = element;
			this.el.setStyles({
				height: this.options.height,
				width: this.options.width
			});
	       
			this.titles = $$('#' + this.elid + ' ul.mootabs_title li');
			this.panelHeight = this.el.getSize().y - (this.titles[0].getSize().y + 4);
			this.panels = $$('#' + this.elid + ' .mootabs_panel');
	       
			this.panels.setStyle('height', this.panelHeight);
	       
			this.titles.each(function(item) {
				item.addEvent('click', function(){
					item.removeClass(this.options.mouseOverClass);
					this.activate(item);
				}.bind(this)
			);
		       
			item.addEvent('mouseover', function() {
				if(item != this.activeTitle){
					item.addClass(this.options.mouseOverClass);
				}
			}.bind(this));
		       
			item.addEvent('mouseout', function() {
				if(item != this.activeTitle){
					item.removeClass(this.options.mouseOverClass);
				}
			}.bind(this));
		}.bind(this));
		if(this.options.activateOnLoad != 'none'){
			if(this.options.activateOnLoad == 'first'){
				this.activate(this.titles[0], true);
			}
			else{
				this.activate(this.options.activateOnLoad, true);       
			}
		}
	},
       
	activate: function(tab, skipAnim){
		if(! $defined(skipAnim)){
			skipAnim = false;
		}
		if($type(tab) == 'string'){
			myTab = $$('#' + this.elid + ' ul li').filter('[title='+tab+']')[0];
			tab = myTab;
		}
		if($type(tab) == 'element'){
			var newTab = tab.getProperty('title');
			this.panels.removeClass('active');
			this.activePanel = $(newTab);
		       
			this.activePanel.addClass('active');
			if(this.options.changeTransition != 'none' && skipAnim==false){
				this.activePanel.setStyle('height', 0);
				var changeEffect = new Fx.Elements(this.activePanel, {duration: this.options.duration, transition: this.options.changeTransition});
				changeEffect.start({
					'0': {
						'height': [0, this.panelHeight]
					}
				});
			}
			this.titles.removeClass('active');
			tab.addClass('active');
			this.activeTitle = tab;
			if(this.options.useAjax){
				this.getContent();
			}
		}
	},
       
	getContent: function(){
		this.activePanel.set('text', this.options.ajaxLoadingText);
		var newOptions = { url: this.options.ajaxUrl + '?tab=' + this.activeTitle.get('title'), update: this.activePanel.get('id') } ;
		this.options.ajaxOptions = $extend(this.options.ajaxOptions, newOptions);
		var req = new Request.HTML(
			this.options.ajaxOptions
		).send();
	},
       
	addTab: function(title, label, content){
		var newTitle = new Element('li', {
			'title': title
		});
		newTitle.appendText(label);
		this.titles.include(newTitle);
		$$('#' + this.elid + ' ul').adopt(newTitle);
		newTitle.addEvent('click', function() {
			this.activate(newTitle);
		}.bind(this));
	       
		newTitle.addEvent('mouseover', function() {
			if(newTitle != this.activeTitle){
				newTitle.addClass(this.options.mouseOverClass);
			}
		}.bind(this));
		newTitle.addEvent('mouseout', function() {
			if(newTitle != this.activeTitle){
				newTitle.removeClass(this.options.mouseOverClass);
			}
		}.bind(this));

		var newPanel = new Element('div', {
			'style': {'height': this.options.panelHeight},
			'id': title,
			'class': 'mootabs_panel'
		});
		if(!this.options.useAjax){
			newPanel.setHTML(content);
		}
		this.panels.include(newPanel);
		this.el.adopt(newPanel);
	},
       
	removeTab: function(title){
		if(this.activeTitle.title == title){
			this.activate(this.titles[0]);
		}

		$$('#' + this.elid + ' ul li').filter('[title='+title+']')[0].dispose();
		$$('#' + this.elid + ' .mootabs_panel').filter('[id='+title+']')[0].dispose();
	},
       
	next: function(){
		var nextTab = this.activeTitle.getNext();
		if(!nextTab) {
			nextTab = this.titles[0];
		}
		this.activate(nextTab);
	},
       
	previous: function(){
		var previousTab = this.activeTitle.getPrevious();
		if(!previousTab) {
			previousTab = this.titles[this.titles.length - 1];
		}
		this.activate(previousTab);
	}
});