var preloadedImages=[];
var initMenu=function(){
	$$('img.hover').each(function(image){
		
		var normalURL=image.src;			
		
		var parts=normalURL.match(/^(.+-)((ro)|(en)|(fr))(\.jpg)$/);
		if (parts){
			var hoverURL=parts[1]+'over-'+parts[2]+parts[6];
	
			var index=preloadedImages.length;
			preloadedImages[index]=new Image();
			preloadedImages[index].src=hoverURL;
			
			var Handler={normalURL:normalURL,hoverURL:hoverURL,mouseover:function(e){ e.target.src=this.hoverURL;},mouseout:function(e){ e.target.src=this.normalURL;}};
			
			Event.observe(image, 'mouseover', Handler.mouseover.bindAsEventListener(Handler));
			Event.observe(image, 'mouseout', Handler.mouseout.bindAsEventListener(Handler));
		}
	});		
};

Event.observe(window, 'load', initMenu, false);