How can I retreive a users Windows logon name?

Hi group, Is there any way I can retreive a users Windows logon name? I'm running a system with IIS 4/PHP 4.0.6/MySQL 3.23.xx. Basicaly what I'm after is some simple way to verify what user is accessing our intranet, without having to prompt the user for his initials. I am aware that this does not provide for much security, but that's ok (I'm not after security, only after a simple user verification). I thank you in advance for your time ;-) /Christian ---------------------------------------------- Christian Sandfeld Zensys A/S ----------------------------------------------