AS3 如何自己主动退出Flash播放？

AS写了一个Flash player 想让它在播放十分钟后自动关闭，怎么做啊？相关退出命令是什么呢？

http://bbs.9ria.com/thread-69945-1-1.html

var PageCountdown: Timer = new Timer(1000, 600);
PageCountdownStart();
function PageCountdownStart() {
PageCountdown.start();
PageCountdown.addEventListener(TimerEvent.TIMER_COMPLETE, PageCountdownOut);
}
function PageCountdownStop() {
PageCountdown.stop();
PageCountdown.reset();
PageCountdown.removeEventListener(TimerEvent.TIMER_COMPLETE, PageCountdownOut);
}
function PageCountdownOut(e: TimerEvent) {
PageCountdownStop();
fscommand("quit");
}