function initRollovers() {
	if (!document.getElementById) return

		var aPreLoad = new Array();
		var sTempSrc;
		var aImages = document.getElementsByTagName('img');

		for (var i = 0; i < aImages.length; i++) {
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '-over'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);

			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;

			aImages[i].onmouseover = function() {
			sTempSrc = this.getAttribute('src');
			this.setAttribute('src', this.getAttribute('hsrc'));
		}

		aImages[i].onmouseout = function() {
			if (!sTempSrc) sTempSrc = this.getAttribute('src').
					replace('-over'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

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