[PHP] second select how???

[Miguel Loureiro]

Hello all,
I have a dynamic select box, according information in database, but I want to restrict 
a second select box with the choice made in the first select box, but my problem is 
that I only know the value of the first one after submit form. It is possible to know 
a choice of a select box without submited ?? 
T.Y.
Best Regards
Miguel Loureiro <[EMAIL PROTECTED] >