Help for a Total Newbie! Referrer Info in Pop-Up Window Needed

Hi,

I'm pretty much a total newbie when it comes to javascript, but I'm hoping some kindly person out there could please help me with a problem.

I have a page on my website which is being linked to directly from domains other than mine. Therefore I want to restrict access to this page unless the visitor has accessed the page from my own domain.

For example:
"http://www.example.com/test.html" should only be viewable when the referrer is either "http://www.example.com/menu.html" or "http://www.example.com/menu2.html".

I found the perfect script that I want to utilise:

<script language="javascript">
var allowedreferrer = new
Array("http://www.example.com/menu.html","http://www.example.com/menu2.html");
if (document.referrer.indexOf(allowedreferrer) == -1) {
alert("You can only access this page from http://www.example.com");
window.location="http://www.example.com";
}
</script>

The problem is that my "test.html" page opens via a javascript pop-up window when a link is clicked in "menu.html" or in "menu2.html", and I don't know how to pass the referrer information into this pop-up. Is this possisble to do via javascript somehow on the client side?

If anyone can please help me I'd really appreciate it.

Thanks so much in advance,
Kate.