I devlop a shopping cart site for Imode using PHP

butin some functionality i am stuck up ( for eg: validation here in
php it require a server trip for that and also dynamic updation of
data in to selection BOX (there are 3 pulldow menu when the content on
first menu is selected on that fetch the corresponding value from
mysqlDb and put it to 2'nd comobo BOX and if user select some value
from 2'nd combo box then depend on that fetch values from DB and put
it to 3'rd combo ang go for search on this values all this combo boxs
are on one page)


Plz help me


PRavin