<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>网页随机跳转</title>
</head>
<body> 
<script language="javascript">
var theAds = new Array(
"http://a.com",
"http://a.com",
"http://a.com",
"http://a.com",
"http://a.com"
);
shu = theAds.length ;
sx = parseInt(Math.random() * shu );
var tanurl = theAds[sx] ;
top.location.href = tanurl;
</script>
</body>
</html>
<script language="javascript">
function dogo(){
var urls = new Array();
urls[0]="site1";
urls[1]="site2";
urls[2]="site3";
urls[3]="site4";
urls[4]="site5";
n = Math.floor(Math.random()* 5);
location.href= urls[n];
}
</script>
<body onload="javascript: dogo();">
</body>