I don't know if this is CSS, but how do you make where when you click on a link in your site that only the center div changes and loads?
See, on my site, when you click on a link the WHOLE page reloads. See here (http://www.geocities.com/emmarobertsonline).

That can't be done using CSS or divs -- you'll need either frames (http://www.lissaexplains.com/frames.shtml#frameset) or iframes (http://www.lissaexplains.com/frames.shtml#frameset).