removeAllChildren

public static function removeAllChildren(container:DisplayObjectContainer):void{  
			try{  
				var child:DisplayObject;  
				for (var i:Number = container.numChildren - 1; i >= 0; i--) {  
					child = container.getChildAt(i);  
					if (child is DisplayObjectContainer && !(child is Loader/*跨域引用图片时，子元素不允许访问，否则报沙箱安全移除*/)) {  
						
						removeAllChildren(DisplayObjectContainer(child));  
					}  
					container.removeChild(child);  
				}  
			}catch(e:Error){  
				Alert.show("Util.removeAllChildren异常:"+e);  
			}  
		}