this[“container”].attachMovie(“useLoad”, “useLoadMc”, this.getNextHighestDepth());

attachMovie 不等于直接赋值，而是将库链接”useLoad”影片命名为”useLoadMc”，并添加到this[“container”]容器中；

所以 remove(this[“container”][“useLoadMc”])，仅仅删除被添加到容器this[“container”]的useLoadMc影片剪辑

/** * 删除非自身的影片 * @param_mc */public function removeAllIn(_mc:Object):Void{var m:MovieClip;for (var i in _mc){m = _mc[i];if ((m != _mc)){remove(m);}}}/** * 删除自身影片 * @param_mc */public function remove(_mc:MovieClip):Void{_mc.getDepth() < 0 ? _mc.swapDepths(_mc._parent.getNextHighestDepth()):0;_mc.removeMovieClip();_mc.unloadMovie();_mc = null;}