Conditional Display of Attribute Choices?

[markhomesurplus]

Hiya!
I would like to display only 1 drop-down attribute
choice which would, after a selection is made,
trigger the display of all three following choices.
..
They are not a complex, branching maze of choices.
There's only three of them.
But they can only be applied if the first choice allows them.
I don't need the attribute choices to CHANGE based on the first choice.
I just need to HIDE them based on the first choice.
..
http://www.homesurplus.com/mm5/merch...ct_Code=DC6P28
..
Example:
Customer selects "Slab Only" as the top choice.
I would like no further attributes to display.
or-
Customer selects "Left hand in-swing"
NOW the final three attribute choices should be displayed.
..
The problem we're having is that the customer is
choosing "Slab Only" at the top, and
"Lock Bore". down below.
We don't include Lock Bore with a plain door slab, but it's
free with a pre-hung door.
..

..
Is there a way I can make the last set of choices show up
on screen conditionally based on the first?
..
Thanks Much in Adance!
Mark at Homesurplus

[callerpatty]

Hi
I see in your miva store that you got this dropdown to work. Would you be willing to share how you got it to do that?
I have a customer needing the same basic thing, but have been unable to find any help.

Thanks in advance!