怎么设置点击间隔时间

private var _mouseDownTime:int;
        private function e_MOUSE_DOWN(evt:MouseEvent):void {
            _mouseDownTime = getTimer();
        }

        private function e_MOUSE_UP(evt:MouseEvent):void {
            if (getTimer() - _mouseDownTime < 275) {
                e_CLICK(evt);
            }
        }