<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>page</title>
</head>
<script type="text/javascript" charset="utf-8">
function load(){
var times = Math.floor(Math.random()*10)*500;
setTimeout(function(){
var iframe = document.getElementById("iframe");
iframe.src = "./100offer.php";
},times);
}
load();
</script>
<body>
<iframe id="iframe" src="" onload="javascript:load();"></iframe>
</body>
</html>