PHP authenticate Windows account

[sleepy04]

Hello everyone .
I have a windows 2003 stand alone server . In this server I have some windows accounts and they all have passwords.
Now I have to create an intranet website on this server (IIS)
My question is how can I use accounts/password on the server to authenticate user through an PHP page ? They have to enter their identity and the webpage log username and the time they login .

Thanks so much .