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)
}
}
}
}