Login and Redirecting Problem

[mescalin]

Hello,

I am trying to redirect ppl who fills the login information;

<input type="hidden" name="url" value="member.php?u=$bbuserinfo[userid]" />

But it gets the userid=0 all the time, can i fix that? or can i read the username entry from the login form and redirect to www.xxxx.com/[username entered in the form]



Another question is, I want to redirect a page when it detects a loggedin user is viewing it. It will check if the user is logged in, if so it will redirect to another page..