This is a collection of relatively 'famous' navigation menus redone using as much CSS as possible, as little images as possible, and no javascript. I was surprised to see how many big sites still use javascript to handle something that is much simpler (and more lightweight) to do with CSS, so I took it upon myself ot build the menus from scratch.
Its also completely open source, so download the html, css, images, project files, etc here.
Note - Each menu (when applicable) uses current page detection to style the link to the page the user is currently on. Learn how to do that with php here.
Shameless.