Well what I'm wanting to do is make a box the same as this (http://build.bournemouth.ac.uk/images/ie_logon.gif)

I think it's java but I'm not 100%, so I just posted here.

If someone can give me the code for it and tell how to use it, it would be vastly apprieated.

Thanks.

I belive this is done using .htaccess, usually you can do this from your cPanel.

EDIT: Great intro to .htaccess
http://www.javascriptkit.com/howto/htaccess.shtml

Yes, that's .htaccess, not Java or JavaScript (not the same!).
JavaScript should never deal with security such as this, simply because it isn't meant to do it.

apache and .htaccess rules

Moved to Web Servers.