var loader1:Loader =new Loader(); var loader2:Loader =new Loader(); var dz1:URLRequest = new URLRequest("a.swf"); var dz2:URLRequest = new URLRequest("b.swf"); //Abtn,Bbtn为按钮 Abtn.addEventListener(MouseEvent.CLICK,cd1); Bbtn.addEventListener(MouseEvent.CLICK,cd2); function cd1(e:MouseEvent):void { //加载a.swf loader1.load(dz1); addChild(loader1); //判断加载有b.swf就干掉 if (loader2.content) { loader2.unloadAndStop(true); } } function cd2(e:MouseEvent):void { //加载b.swf loader2.load(dz2); addChild(loader2); //判断有a.swf就干掉 if (loader1.content) { loader1.unloadAndStop(true); } }