code: function MenuBar(options) {
  		options.skipTriggerEventListeners = true; //we want different event listeners on the trigger node
  		Dropdown.call(this, options); //invoke super constructor
  		
  		this._initialize();
  		this._dropdownNode.tabIndex = -1;
  	}
docs: @class orion.webui.MenuBar
  @extends orion.webui.Dropdown
  
  Attaches menubar behavior to a given node.
  
  @see orion.webui.Dropdown for more documentation
  
  @name orion.webui.contextmenu.MenuBar