function domRollover() {
	if (navigator.userAgent.match(/Opera (\S+)/)) {
		var operaVersion = parseInt(navigator.userAgent.match(/Opera (\S+)/)[1]);
	}
	
	if (!document.getElementById || operaVersion <7) return;
	
	var imgarr = document.getElementsByTagName('img');
	var imgPreload = new Array();
	var imgSrc = new Array();
	var imgClass = new Array();
	
	for (i=0; i<imgarr.length; i++){
		if (imgarr[i].className.indexOf('domroll') != -1) {
			imgSrc[i] = imgarr[i].getAttribute('src');
			imgClass[i] = imgarr[i].className;
			imgPreload[i] = new Image();
			
			if (imgClass[i].match(/domroll (\S+)/)) {
				imgPreload[i].src = imgClass[i].match(/domroll (\S+)/)[1]
			}
			
			imgarr[i].setAttribute('xsrc', imgSrc[i]);
			imgarr[i].onmouseover = function() {
				this.setAttribute('src',this.className.match(/domroll (\S+)/)[1])
			}
			
			imgarr[i].onmouseout = function() {
				this.setAttribute('src',this.getAttribute('xsrc'))
			}
		}
	}
}

domRollover();