I need to make a pop-up window for users to log-in to my website from other websites.

I need to use a pop-up window to show the user the address bar so that they know it is a secure login, and not a spoof. For example, if I used a floating iframe, websites could spoof my login window and record the user's login information.

Thanks

Additional details: My pop-up will come from javascript code from within an iframe in any domain. I know this sounds like I'm creating adverts.. but really I'm not. If it makes any difference, the iframe domain and the pop-up domain are the same.

1 more detail, I'm looking to do the same thing "Facebook Connect" does... if you aren't logged into facebook, they allow you to login to facebook from any domain by showing a pop-up on that domain's site. For an example, go to any article at techcrunch.com and use Facebook Connect to comment. Make sure you're logged out of facebook and you'll see what I'm talking about.