var initImages = function(){
	var images_li = $$('.frames li');
	
	//alert(images_li.length);
	
	images_li.each(function(item){
		item.addEvent('mouseover', function(){			
			var imgs = this.getElements('a img');			
			if (imgs.length == 2){
				imgs[0].addClass('hidden');
				imgs[1].removeClass('hidden');			
			}
		});
		item.addEvent('mouseout', function(){			
			var imgs = this.getElements('a img');			
			if (imgs.length == 2){
				imgs[1].addClass('hidden');
				imgs[0].removeClass('hidden');
			}
		});
	});	 
}

var initPage = function(){
	initImages();
}

window.addEvent('domready',initPage);