Button press change color of the buttom

Hi…

I am a new guy to flash and action script. It may be a simple thing but really am much struggling to do this cause of new to flash and as2.0. I am using flash 8 and as2,

My problem is i have one button on stage. i have to change the color of the button while press then if repress on that same button that should go normal state.

help me…