Tabulating

I'm working on some webapps where I've got several pages of information that a user will be flipping between. There are two factors I am trying to minimize: user wait and server load. Also because the application will be deployed in an environment with a variety of browsers and little user control over the system, the application needs to degrade gracefully.

The basis for most of these comes from pure CSS menus.

Ideal Case: Full CSS and Full ECMAScript

Ideally, I will have a browser that fully supports both css and ecmascript (i.e. Mozilla). What will the tabs look like in that case?

Tab One