new function(){
var overFn = function(){
var imgObj = document.getElementsByTagName("img");
var preload = new Array();
for(var i=0, i_len = imgObj.length ; i < i_len; i++){
var unitC = imgObj[i].className.split(/\s+/);
for(var k=0, k_len = unitC.length; k < k_len; k++){
if(unitC[k] == "rollover"||imgObj[i].getAttribute("src").match("_off.")){
preload[i]=new Image();
preload[i].src = imgObj[i].getAttribute("src").replace("_off.", "_on.");
imgObj[i].onmouseover = function(){
this.setAttribute("src",this.getAttribute("src").replace("_off.","_on."));
}
imgObj[i].onmouseout = function(){
this.setAttribute("src",this.getAttribute("src").replace("_on.", "_off."));
}
break;
}
}
}
}		
function addEvent(elm,listener,fn){
try{
elm.addEventListener(listener,fn,false);
}catch(e){
elm.attachEvent("on"+listener,fn);
}
}
addEvent(window,"load",overFn);
}