SEO CSS Menu Example
When the 2nd option is used, the search engines can crawl your menu structure on any page where your menu is shown. Another characteristic is that you can use a different menu structure on different pages. Since the menu is built "on-the-fly", based on <UL><LI> tags inside your pages' HTML code, you can have different tags (menu items) on different pages.
The links below show pages with a slightly different <UL><LI> structure:
Page 1: Original SEO CSS menu
Page 2: The "Customers" item is now placed after the "Products" item.
Page 3: The "Download" item has a submenu now.