Other possibilities...

If you have limited space on your page for navigation, but a lot of pages on your site, use a navigation bar with drop-down menus. They are easiest to create and maintain in pages using frames.

The buttons on this page are 2-state: they look one way before you roll your mouse over them, then change when as you move the mouse point onto them. But we can also do 4-state rollovers. They change again when you click on them (3rd state) and while you are on the page they link to, they remain in the 4th state - sort of a bookmark - until you click on another button and move to a different page. I'll add an example soon.

I was serious when I said the possibilities are endless!

On the left, I've also included two navigation panels. Font sizes, outline boxes, background colors are all optional/changeable/variable... all depending on the type of effect you're looking for.