Bt = {
	
	start:function(){

		Bt.menu = $$('span.hasclick');
		Bt.activateMenu(Bt.menu);	
	},
	
	activateMenu:function(menu){
		menu.each(function(i){
			i.addEvent('click',function(e){
				//console.log(this.id.substr(1));
				var tid = this.id.substr(1);
				Bt.active = tid;
				if(Bt.previous != null)
					$(Bt.previous).setStyle('visibility','hidden');
				$(tid).setStyle('visibility','visible');
				Bt.showViewer(false);
			});
			i.addEvent('mouseout',function(e){
				Bt.previous = Bt.active;
			});
		});
		
	},
	
	showViewer:function(bshow){
		var f = (bshow) ? 'visible' : 'hidden';
		$('vthumb').setStyle('visibility',f);
		$('vdesc').setStyle('visibility',f);
	}

}

window.addEvent('domready',Bt.start);