function iniRO(){
if(!document.getElementById){
return;
}
var preLoads=new Array();
var allImages=document.getElementsByTagName('img');

for (var i=0; i<allImages.length; i++){
	if(allImages[i].getAttribute("src").match("_off.")){
		var src = allImages[i].getAttribute('src');
		var ftype = src.substring(src.lastIndexOf('.'), src.length);
		var tmp =src.substring(0,src.lastIndexOf('_off'));
		var on_src=tmp.concat('_on'+ftype);

allImages[i].setAttribute('pSrc', src);
allImages[i].setAttribute('oSrc', on_src);

preLoads[i] = new Image();
preLoads[i].src = on_src;

allImages[i].onmouseover=function(){
this.setAttribute('src', this.getAttribute('oSrc'));
}
allImages[i].onmouseout=function(){
this.setAttribute('src', this.getAttribute('pSrc'));
}
}
}
}