function smartRollover() {
	if(document.getElementsByTagName) {
		var images1 = document.getElementsByTagName("img");
		changeImages(images1);

		var images2 = document.getElementsByTagName("input");
		changeImages(images2);
	}
}

function changeImages(images) {

	for(var i=0; i < images.length; i++) {
		attribute = images[i].getAttribute("src");
		
		if(attribute !=null && attribute.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", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}