怎樣用AS3.0代碼來讓Flash Player進入全屏模式？怎樣用AS3.0代碼來讓Flash Player退出全屏模式？

import flash.display.MovieClip;

import flash.events.Event;

import flash.events.MouseEvent;

import flash.display.Stage;

import flash.display.StageDisplayState;

public class Fulltxttest extends MovieClip{

public function Fulltxttest()

{

this.bnt1.addEventListener( MouseEvent.CLICK, btnClick);

}

protected function btnClick( evt:MouseEvent):void

{

switch(stage.displayState)

{

case "normal":

stage.displayState = "fullScreen";

break;

case "fullScreen":

stage.displayState = "normal";

break;

default:

stage.displayState = "normal";

break;

}

}

}

}