[support] Creating a "Terms of use" page

[Shérab]

Dear all,

I'm building a site where userwill be allowed to register only after
they have accepted some conditions.
I created the registration form with webform.
Could somebody please suggest a way to have a two-steps registration
process where the user has to accept the terms of use (fist step) to be
allowed to poceed.
Having a one-step registration process where the terms of use would be
associated with a checkbox would be okay, but then how to validate a
registration only if the terms of use have been accepted ?

As an additional constraint, a solution not relying on javascript would
be preferred.

Thanks very much in advance for any help,
Sherab.