var menuItem:ContextMenuItem = new ContextMenuItem("技术支持：中科天宇软件有限公司", true, true);                menuItem.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, function(event:ContextMenuEvent):void                {                    navigateToURL(new URLRequest("http://www.tiannyu.com/"));                });                myMenu = new ContextMenu();                myMenu.customItems.push(menuItem);                                myMenu.hideBuiltInItems();                this.contextMenu = myMenu;                                if (this.contextMenu)                {                    if (this.contextMenu["customItems"] is Array)                    {                        while((this.contextMenu["customItems"] as Array).length>0)                        {                            (this.contextMenu["customItems"] as Array).pop();                        }                        (this.contextMenu["customItems"] as Array).push(menuItem);                    }                    else if (this.contextMenu["addItem"])                    {                        this.contextMenu["addItem"](menuItem);                    }                }