//=====================================================================
//  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();