//=====================================================================
//  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 (parseFloat(navigator.appVersion.toLowerCase().substring(navigator.appVersion.toLowerCase().indexOf('msie')+5,navigator.appVersion.toLowerCase().indexOf(';',navigator.appVersion.toLowerCase().indexOf('msie')))) <= 7) {
		// DO NOT RUN ROLLOVER SCRIPT
	}
	else {
		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();