function addRollover(img, rolloverURL){
	if(typeof img == "string"){
		var id	=	img;
		img	=	null;
		
		if(document.getElementById){
			img	=	document.getElementById(id);
		}else if(document.all){
			img	=	document.all[id];
		}
		
		if(!img){
			img	=	document.images[id];
		}
		
		if(!img){
			return;
		}
	}
	
	if(img.tagName.toLowerCase() != "img"){
		return;
	}
	
	var baseURL		=	img.src;
	
	(new Image()).src	=	rolloverURL;
	
	img.onmouseover		=	function(){ img.src = rolloverURL; }
	img.onmouseout		=	function(){ img.src = baseURL; }
	
}
	
function initRollovers(){
	var images	=	document.getElementsByTagName("img");
	
	for(var i = 0; i < images.length; i++){
		var image	=	images[i];
		
		var rolloverURL	=	image.getAttribute("rollover");
		
		if(rolloverURL){
			addRollover(image, rolloverURL);
		}
	}	
}