window.onload = pageInit;

	
function pageInit() {
	rolloversInit();
}

function rolloversInit() {
	if (!document.getElementById) return;
	
	var arrPreload = new Array();
	var strSrcTmp;
	var arrImages = document.getElementsByTagName('img');
	
	for (var i=0; i<arrImages.length; i++) {
		if (arrImages[i].className == "rollover") {
			var src = arrImages[i].src;
			var imgtype = src.substring(src.lastIndexOf("."), src.length);
			var altsrc = src.replace(imgtype, "_over" + imgtype);

			arrImages[i].setAttribute('altsrc', altsrc);
			arrPreload[i] = new Image();
			arrPreload[i].src = altsrc;
			
			arrImages[i].onmouseover = function() {
				strSrcTmp = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('altsrc'));
			}

			arrImages[i].onmouseout = function() {
				if (!strSrcTmp) strSrcTmp = this.getAttribute('src').replace("_over" + imgtype, imgtype);
				this.setAttribute('src', strSrcTmp);
			}

		}
	}
}