AS3.0 倒计时+进度条

package com{
    import flash.display.MovieClip;
    import flash.utils.Timer;
    import flash.events.TimerEvent;
    import flash.text.TextField;

    public class CutTime extends MovieClip {

        public static var timer:Timer;
        public static var countTimes:Number = 30;
        public static var moveMc:MovieClip;
        public static var startX:Number;
        public static var txt:TextField;
        public function CutTime(_moveMc:MovieClip,_txt:TextField) {
            txt = _txt;
            moveMc = _moveMc;

            timer = new Timer(25);
            timer.addEventListener(TimerEvent.TIMER,onTimer);
            timer.start();
            startX = moveMc.x - moveMc.width;
            moveMc.x = startX;
        }
        public static function inint() {
            moveMc.x = startX;
            timer.start();
            trace("弹框小时候执行的");
        }
        public function onTimer(e:TimerEvent) {
            moveMc.x = moveMc.width * timer.currentCount / (countTimes * 40) + startX;
            var num:uint = countTimes - timer.currentCount / 40;
            txt.text = num.toString() + "S";
            //trace(num,countTimes+":j进度条倒计时",timer.currentCount)
            if (num==countTimes) {
                timer.reset();
            }
        }
    }

}