header() redirect in same frame

[Anon]

I have a simple authentication script in a frame on my front page that passes a user name and password to function auth().

I also set a cookie at the bottom of the auth() function and send header information:
header("location:[url]?set_cookie=1")

The function, of course, trys to return something, but it keeps doing it in a NEW window.

I really want it to redirect to different php page, but I want it to come up in to the same frame.

Can someone point me in the right direction?
I sure would appreciate it 🙂

Thanks!
DNorton