PHP Authentication pop-up box...

Hi! I use the HTTP Authentication for logging in to the website. But suppose I have a couple of webpages that use the delete priviledge, so I would need a different authentication method just only for that webpages. So, it can not be a HTTP Authentication because the user id and password will become a different one for the duration of the web session. So, what I need is a non-http authentication of some sort that can pop-up those grey box then use PHP to match it. I rather not have those ugly looking html table with input text boxes for user id and passwords... Anyone know?? Thanks, FletchSOD