//=====================================================================
//  DOM Image Rollover v3 (hover)
//
//  Demo: http://chrispoole.com/scripts/dom_image_rollover_hover
//  Script featured on: Dynamic Drive (http://www.dynamicdrive.com)
//=====================================================================
//  copyright Chris Poole
//  http://chrispoole.com
//  This software is licensed under the MIT License
//  <http://opensource.org/licenses/mit-license.php>
//=====================================================================

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();