Authenticated User Session Control On Non-VB Page

[LifesGreatestGift]

ok, its working! Thank you! But one quick question

How would I go about changing it from giving a no permission login screen when not logged in, to having my popup, and directing them to the main page like this

PHP Code:

$url = "http://www.thewindows7site.com/forum/";

<NON CODED> If user isnt logged in

then do this</NON CODED>

<script type="text/javascript" language="JavaScript">
<!--
alert("You Must Register/Login To The Forum\n\To Use This Feature. -Administration Team");

   window.location="<?php echo $url; ?>";
// -->
</script>