603531.html
<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
var frame = document.getElementById("f");
var frameWindow = frame.contentWindow;
document.body.removeChild(frame);
document.body.setUserData("x", frameWindow, null);
document.body.setUserData("x", "", null);
}
</script>
</head>
<body onload="boom();"><iframe id="f" src="data:text/html,"></iframe></body>
</html>
