[Maraekb]

Может так?

stop();
 
green_btn.addEventListener(MouseEvent.CLICK, a) ;
red_btn.addEventListener(MouseEvent.CLICK, b) ;
blue_btn.addEventListener(MouseEvent.CLICK, c) ;
 
function a(e:MouseEvent):void
{ 
gotoAndStop("green");
} 
 
function b(e:MouseEvent) :void
{
 gotoAndStop("red");
}
 
function c(e:MouseEvent) :void
{
 gotoAndStop("blue");
}