YAHOO.util.Event.onContentReady("navbar", function () {

                // Instantiate and render the menu bar

                var oMenuBar = new YAHOO.widget.MenuBar("navbar", { autosubmenudisplay: true, hidedelay: 750, lazyload: true });

                /*
                     Call the "render" method with no arguments since the markup for 
                     this menu already exists in the DOM.
                */

                oMenuBar.render();

            });