Posting form variables with http authentication

Hi everyone, This question is almost certainly an RTFM but I can't find it so I am going to ask anyway. I have a form on my ssl which I need to submit to a perl handler on another server. Problem is the company on the other side is requiring a http authentication to submit the form. I can't think of any way to send the authentication headers along with the form post. Perhaps I just don't know enough about that area. I was thinking that perhaps I could build a handler page on my server to take the original submission via post then send another post via PHP along with the headers needed for authentication. Before I even try this I was wondering if someone out there had ever done this or could point me in the right direction of some documentation in this area. If it can't be done I would appreciate knowing that as well. Thanks! Gerard Onorato