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)
				}
			}
		}
}
window.onload = rollover;