hi,
The method of providing a submit button along with
a dropdown box is usually good and more user friendly.
Even if u have 2 dropdown boxes of which the options
of one changes according to the selected index of the
other, it is wise to use scripting such as Javascript 
than going for ASP.I have seen many sites implementing
a dropdown box wihout a submit button and I found it
quite annoying.Other than this, there is no difference
in the 2 methods.
bye,
ranju.

--- Melinda Savoy <msavoy@c...> wrote: > Is
there a down side to using a dropdown box and
> having the page 
> automatically run your ASP code when you have the
> user make their 
> selection for the dropdown box instead of having the
> user make a selection 
> and pressing a submit button?