Button Help! Create a button that remains depressed

Hi there,

I have been put on a project that is totally outside my comfort zone =(  I need to make a simulator of sorts in Flash CS4 (I've never used Flash before). To keep this as simple as possible, I need to make a button that changes color when clicked on and then returns to it's original color when clicked again. I think if I can get this much working, I will be able to build on it and continue to learn.

Eventually, I will have about 15 buttons on the stage at one time.  Each button will light up when pressed and the light will turn off when pressed again.  Later, I will need to show diferent senarios where one button push turns on multiple button lights.

I'd appreciate any help anyone has to offer!  I've been struggling and making very little progress and my deadline is approaching.  Thanks so much for reading this