The Horizontal Menus extension creates horizontal submenus for a horizontal navbar. Each menu has the same width as the main navbar, with deeper levels arranged in rows underneath each other.
In this demo the border-top of child menus has also been
removed, to make the menus look like they merge together:
/* top border tweak to make deeper menu levels merge together */#udm ul ul { border-top:none !important; }This extension is not supported in Mac/IE5, Win/IE5.0, Opera versions earlier than 7.5, or Mozilla browsers earlier than 1.3.