function rollOver() {
	if(document.getElementsByTagName) {
		var topNav = document.getElementById("topNav");
		var images = topNav.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}

		}
	}
	if(document.getElementsByTagName) {
		var variationLink = document.getElementById("variationLink");
		var images = variationLink.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}

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