//=====================================================================  
//  DOM Image Rollover v3 (hover)  
//  
//  Demo: http://chrispoole.com/scripts/dom_image_rollover_hover  
//=====================================================================  
//  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'))  
            }  
        }  
    }  
}  
  
window.onload = domRollover;