Dynamic change of jsp page

Hi all, here I've one scenario..please help me out to solve this

I've one dropdown in that I've some values. Which ever i select the following page should change look and feel (one page n should get changed dynamically).


For eg:
          If i select ABC the navigation should display horizontally

          if i select XYZ then the navigation should be vertically
(Look and feel should happen only in one page)



IF u've any queries for understanding let me know...

I hope u'll help

Thanks
Anil