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