Navbar_client_i5.jsp Vs Navbarfixed_client_ie5.jsp

Hey everyone,

Just a quick question if anyone knows it. What is the difference (use wise by the portal) between Navbar_client_i5.jsp and Navbarfixed_client_ie5.jsp? I know the diff b/w client and just normal nav has to do with serverside vs client rendering but I do not know what the purpose specifically of the Fixed jsp files are?

Does anyone know?