flash中做获取鼠标点击的事件

var minuteTimer:Timer = new Timer(1000, 5);
minuteTimer.addEventListener(TimerEvent.TIMER_COMPLETE, onTimerComplete);//计时器计时完后触发的事件
_global.singnal="";
trace("?????????test");
function onTimerComplete(event:TimerEvent):Void {
     trace("Time's Up!");
    //gotoAndPlay();//跳转到屏保的帧
}
_root.onMouseDown=function(){
    trace("test>>>>>>"+_global.singnal);
    if(_global.singnal!=""){
        minuteTimer.reset();//恢复
        minuteTimer.start();//开始计时
    }else{
        trace("testing time!");
        minuteTimer.start();//开始计时
        _global.singnal="aa";
    }
}