stage.addEventListener(Event.ENTER_FRAME,fps);

function fps(e:Event):void

{

pole.text = String(e.target.frameRate);

}

private var lastFrameTime:Number;

 

function fps(e:Event):void

{

var now:Number=getTimer();

var elapsed:Number = now-lastFrameTime;

var framesperSecond:Number=Math.round(1000/elapsed);

 

pole.text = String(framesperSecond);

lastFrameTime = now;

}

speedY = (speedY > maxSpeedY) ? maxSpeedY : speedY;