代码：
var my_btn:fullbotton=new fullbotton(100,50,12);
addChild(my_btn);
在HTML中使用方法（感谢KAKA）：
function cl(evt:MouseEvent):void {
stage.displayState=StageDisplayState.FULL_SCREEN;
}
my_btn.addEventListener(MouseEvent.CLICK,cl);
然后HTML标签中修改一下：
要在标签中加入allowFullScreen="true"
演示：
http://www.taoshaw.com/taoshaw/study/as3fullscreen/method2.html
package {
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.text.TextField;
import flash.text.TextFieldAutoSize;
public class fullbotton extends MovieClip {
public function fullbotton(b_width:int,b_height:int,f_size:int) {
var _Rect:Sprite = new Sprite();
_Rect.graphics.beginFill(0xff0000,1);
_Rect.graphics.drawRect(0, 0, b_width,b_height);
_Rect.graphics.endFill();
addChild(_Rect);
_Rect.buttonMode=true;
var t:TextField = new TextField();
t.htmlText="<FONT SIZE=’"+f_size+"’ color=’#ffff00’ ><b>点击此处切换观看模式(全屏/普通)</b></font>";
t.autoSize=TextFieldAutoSize.LEFT;
t.x=30;
t.y=2;
_Rect.addChild(t);
var _Rect1:Sprite = new Sprite();
_Rect1.graphics.beginFill(0x000000,0);
_Rect1.graphics.drawRect(0, 0, b_width,b_height);
_Rect1.graphics.endFill();
_Rect.addChild(_Rect1);
_Rect.addEventListener(MouseEvent.CLICK, clickHandler);
}
private function clickHandler(event:MouseEvent):void {
switch (stage.displayState) {
case "normal" :
stage.displayState="fullScreen";
break;
case "fullScreen" :
default :
stage.displayState="normal";
break;
}
}
}
}
使用：import flash.display.MovieClip;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.text.TextField;
import flash.text.TextFieldAutoSize;
public class fullbotton extends MovieClip {
public function fullbotton(b_width:int,b_height:int,f_size:int) {
var _Rect:Sprite = new Sprite();
_Rect.graphics.beginFill(0xff0000,1);
_Rect.graphics.drawRect(0, 0, b_width,b_height);
_Rect.graphics.endFill();
addChild(_Rect);
_Rect.buttonMode=true;
var t:TextField = new TextField();
t.htmlText="<FONT SIZE=’"+f_size+"’ color=’#ffff00’ ><b>点击此处切换观看模式(全屏/普通)</b></font>";
t.autoSize=TextFieldAutoSize.LEFT;
t.x=30;
t.y=2;
_Rect.addChild(t);
var _Rect1:Sprite = new Sprite();
_Rect1.graphics.beginFill(0x000000,0);
_Rect1.graphics.drawRect(0, 0, b_width,b_height);
_Rect1.graphics.endFill();
_Rect.addChild(_Rect1);
_Rect.addEventListener(MouseEvent.CLICK, clickHandler);
}
private function clickHandler(event:MouseEvent):void {
switch (stage.displayState) {
case "normal" :
stage.displayState="fullScreen";
break;
case "fullScreen" :
default :
stage.displayState="normal";
break;
}
}
}
}
var my_btn:fullbotton=new fullbotton(100,50,12);
addChild(my_btn);
在HTML中使用方法（感谢KAKA）：
function cl(evt:MouseEvent):void {
stage.displayState=StageDisplayState.FULL_SCREEN;
}
my_btn.addEventListener(MouseEvent.CLICK,cl);
然后HTML标签中修改一下：
要在标签中加入allowFullScreen="true"
演示：
http://www.taoshaw.com/taoshaw/study/as3fullscreen/method2.html