Hi, I currently want to build the login form where the process will be:

1.User choose their membership type like free, gold, platinum (role)- bind from role db

2.User go to fill in login, pw, secret question.. page

3.User go to other page continue, finally complete

But problem faced when i want to pass the selected role type in 1st step into 2nd step, then only add role [failed to pass], since in first step, there's no username yet, so add role is failed..

I try to pass data in the same page, but failed...

Besides, how to show limited role membership in drop down box?
The application will have following role: Admin, Manager, free member, gold member, platinum member.
But when I let visitor to signup, I only want to bind the free, gold, platinum member out, not others.

Help