How do I determine objects in a group?

[Zac Elston]

I think I wasn't clear on my intentions.

I am currently using circle graphics as choices in a selection.

I know...why would I use graphics instead of buttons?  Buttons are for
pressing, not graphics..but I need graphics.

The user can select only one circle from a group of circles.  I use a
backgroundcolor change to indicate selection.  So basically I have to change
a property of an object within a group while resetting the same property of
all the other objects in that group.

 I can write a script for each circle

On mouseup
Put name into varX
Set the backgroundcolor of graphic 1 to red
Set the backgroundcolor of graphic 2 to gray
Set the backgroundcolor of graphic 3 to gray
End mouseup
And change the red to match the graphic being pressed.

But that seems tedious.

Using 
Set the backgroundcolor of group 1 to gray
Set the backgroundcolor of target to red
Doesn't work because once red, the graphic will not change to gray when
another circle is pressed.

I was hoping there was a slick way to determine this like writing a loop in
the parent that allows me to bypass writing an action for my ..lets
see..30,000 circles I will end up with.

Repeate for each object in group
Set the backgroundcolor of object to gray
end
Set the backgroundcolor of target to red

Or even if I use buttons, using hilitedButton wants the button id within the
group.  How can I determine that from outside the group? I want to pass a
variable instead of a number.

Can I reverse lookup the group members?  I can get the group name from the
long name of the target but I don't seem to be able to determine what id
within the group that target has.

So is there an answer to the question:
How to I determine objects in a group?

Thanks
-zac