conditional display of second selection-list

[ba...@wipro.com]

I want to display a selection-list-B in a cocoon form on the submit of
another selection-list-A.Initially only selection-list-A is visible on
the page.   
 
<fi:styling submit-on-change="true"/>
 
goes to :-
 
<selection-list>
          
  <item value="ABC" />
  <item value="DEF"/>
  <item value="GHI"/>
 </selection-list>
   
   
           
          <on-value-changed>
            
         <javascript>
           
         func(event);
         
         </javascript>
           
          </on-value-changed>  
 
How can I make the selection-list-B visible on the same page as
selection-list-A.
 
Kindly suggest a way
 
Thanks in advance
 
Baskar