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);

                    }

                }