From the lead page ofWebsite
Design & Maintenance: Choice of navigation methods, usually using navigation menu(s), can be critical as visitors will wish to find desired content with as little effort as possible. Menus vary widely depending on the purpose of the website.
Navigation on this web site is not typical. Most websites use a single navigation menu at the top or left side of each web page though there are many variations. There are also variations to the 'look & feel'- many different font sizes, colors and images may be used in navigation menus.
Here is a very simple, typical drop-down navigation menu. This type of menu is usually found at the top of web pages (mouseover and/or leftclick each heading to view):