function ROfunction(){
	var imgNum=document.getElementsByTagName("img");

	overNum=new Array;
	for(i=0;i<imgNum.length;i++){overNum[i]=imgNum[i];}
	for(i=0;i<overNum.length;i++){
		if(overNum[i].className.indexOf("Rover")!=-1){
			overNum[i].overimg=new Image();
			if(overNum[i].className.indexOf(":")!=-1){
				Replace=overNum[i].className.split(":");
				Replace=Replace[1].split(" ");
				overNum[i].overimg.src=Replace[0];
			}else{
				Replace = overNum[i].src.length;
				overNum[i].overimg.src=overNum[i].src.substring(0,Replace-4)+"-o"+overNum[i].src.substring(Replace-4,Replace);
			}
			overNum[i].setAttribute("out",overNum[i].src);
			overNum[i].onmouseover=new Function('this.src=this.overimg.src;');
			overNum[i].onmouseout=new Function('this.src=this.getAttribute("out");');
		}
	}
}
window.onload=ROfunction;