用javascript写了个刷pv的小程序

<script language="javascript">
for(var i = 0; i <10; i++){	
	e = document.getElementById("fr").cloneNode(true);
	e.id = "fr"+i;
	e.name=e.id;
	document.body.appendChild(e);
	document.body.appendChild(document.createElement("
"));
}
var n=0;
function refreshPage(){
	document.getElementById("fr"+n%10).src=document.getElementById("fr"+n%10).src+ "?".concat(Math.random()); 
	n++;
	
}
setInterval(refreshPage,1000);
</script>