How can I use AS to figure out which frame the playhead is at?

programming flash
1

I’m trying to create a button that functions a bit differently depending on which frame the playhead is located. Below is my code. Obviously, the property “FRAME” is undefined. How do I define that property as the current location of the playhead (ie which frame in the timeline we are currently on)

 function AudioControl(evt:Event):void{
    if (FRAME < 215){
        function AudioOff(evt:Event):void{
            gotoAndStop("End");
        }
    }else{
        function AudioOn(evt:Event):void{
            gotoAndPlay("Start");
        }
    }
}
    
bAudioControl.addEventListener(MouseEvent.CLICK, AudioControl);

Thanks for any help or suggestions!!!