Recommended WAI-ARIA implementation for navigation bar/menu

Question

We are in the process of implementing (i.e. adding) WAI-ARIA support to the main navigation menu of a web portal. Menu is the one shown here:

Answer 1

As an FYI, you can get a menu to announce 'X of Y' information by adding aria-posinset and aria-setsize attributes to the elements with role=menuitem. Sincerely, Bryan Garaventa