In the Identity Manager User Interface, the horizontal navigation bar is driven by the End User Navigation User form in enduser.xml. The userHeader.jsp, which is included in all Identity Manager User Interface pages, includes another JSP named menuStart.jsp. This JSP accesses two system configuration objects:
ui.web.user.showMenu. Toggles the display of the navigation menu on and off. The default value is true.
ui.web.user.menuLayout. Determines whether the menu is rendered as a horizontal navigation bar with tabs (the default value is horizontal) or as a vertical tree menu (vertical).
The CSS style classes that determine how the menu is rendered are defined in style.css.
If you implement custom JavaScript functions in the end user navigation bar (tabs), you must use endUserNavigation to reference that form (for example, document.forms['endUserNavigation'].elements).