window.onload = function initRollovers() {
		if (!document.getElementsByTagName) return
		
		var aPreLoad = new Array();
		var sTempSrc;
		var aImages = document.getElementsByTagName('img');

		for (var i = 0; i < aImages.length; i++) {		
			if (aImages[i].className == 'imgNav') {
				var src = aImages[i].getAttribute('src');
				if( /On/.test(src) ) continue;
				var ftype = src.substring(src.lastIndexOf('.'), src.length);
				var hsrc = src.replace(ftype, 'On'+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('On'+ftype, ftype);
					this.setAttribute('src', sTempSrc);
				}
			}
		}
	}