Actionscript 3: Detect the difference between a Mouse click and a Mouse drag.

How do you tell if the user clicked or dragged in your flash app? Take a look:

private var time:uint;

function onMouseDown(event:Event):void {
     time = getTimer();
     startDrag();
}

function onMouseUp(event:Event):void {
     var diff = getTimer() - time;
     if (diff < 250) {
           trace("clicked");
     }
     stopDrag();
}