package {
     import flash.display.MovieClip;
     import flash.events.MouseEvent;
     public class Ball extends MovieClip {
          public function Ball() {
              trace("ball created: " + this.name);
              this.buttonMode = true;
              this.addEventListener(MouseEvent.CLICK, clickHandler);
              this.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownListener);
              this.addEventListener(MouseEvent.MOUSE_UP, mouseUpListener);
          }
          private function clickHandler(event:MouseEvent):void {
              trace("You clicked the ball");
          }
          function mouseDownListener(event:MouseEvent):void {
              this.startDrag();
          }
          function mouseUpListener(event:MouseEvent):void {
              this.stopDrag();
          }
     }
}