newbie button question

Hi all,
I want my navigation buttons to be in downstate while on the destination page
(and of course return to upstate when another is clicked).

In the onClick function Ive tried
gotoAndStop(event.target.downState); but this just throws an error (Error
#2109: Frame label [object StaticText] not found in scene Scene 1 to be precise.

Can anyone advise on the best way to do this?

thanks
G

gotoAndStop( - needs a frame here -)

you cant put an object in there

you will need to write a function that passes the buttons as parameters and
the button that is clicked will need its image swapped or tween (or for the
timeline to go to the appropriate frame if you're using the timeline) and the
same function will also have a parameter, the button was previously clicked,
and it will reverse the tween/swap/timeline of the previously clicked button