<!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 runat="server">
<title>Untitled Page</title>
<script type="text/javascript" language="javascript">
var win;
function openNew(){
win=window.open();
window.close();
}
</script>
</head>
<body >
<input type='button' onclick='openNew()' value='弹出窗体'>
</body>
</html>
window.location=url;
var win=window.open(url);
if(win) window.close();
要不这样试试?