function rollover() {
	if (!document.getElementById) return
	var imgOrSrc;
	var imgPreload = new Array();
	var images = document.getElementsByTagName('img');
	for (var i = 0; i < images.length; i++) {
		if (images[i].getAttribute('rsrc')) {
			imgPreload[i] = new Image();
			imgPreload[i].src = images[i].getAttribute('rsrc');
			images[i].onmouseover = function() {
				imgOrSrc = this.getAttribute('src');
				this.setAttribute('src',this.getAttribute('rsrc'))
			}
			images[i].onmouseout = function() {
				this.setAttribute('src',imgOrSrc)
			}
		}
	}
}