if(window.addEventListener)
{
	window.addEventListener("load", initRollovers, false);
}
else if(window.attachEvent)
{
	window.attachEvent("onload", initRollovers);
}

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);
	}
}