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