function init() {
  	if (!document.getElementById) return

  	var imgOriginSrc;
  	var imgTemp = new Array();
  	var imgarr = document.getElementsByTagName('img');

  	for (var i = 0; i < imgarr.length; i++) {
   		if (imgarr[i].getAttribute('customOver')) {
   		     imgarr[i].onmouseover = function() {
    		        this.className='over';
    		    }
    		    imgarr[i].onmouseout = function() {
    		        this.className='off';
    		    }
    		}
  	}
}
onload=init;