menuBar This object is used to specify whether or not the menu bar is to be displayed in the newly opened window. The window.open() method is used to open the window, and the 'menuBar' is part of a comma delimited list of values which are placed within the opening and closing brackets of the open() method. Used as a statement in Netscape's Navigator, it is possible to change, using signed scripts, whether or not the menu bar is displayed as a function of user input. That is, the menu bar may be hidden after the window has been opened with the menu bar showing. Note the lack of any methods, collections, or event handlers for this object. DOM Reference Netscape Navigator window.menuBar The properties of the menuBar object are: visible