You're after 3 columns, right?
http://www.glish.com/css/7.asp
http://www.bluerobot.com/web/layouts/layout3.html
http://www.saila.com/usage/layouts/
and a whole lot more here:
http://css-discuss.incutio.com/?page=ThreeColumnLayouts
Also - it helps when you ask for help if you can upload the contents of the page somewhere as it allows us to see
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If you want your three column layout to have three equal columns and work properly in all browsers I would recommend the following:
- Head toward a fixed with layout as dividing DIVs up in to 3 columns and 33% doesn't work too nicely in some cases - especially if you're trying to fit your header in and be the same width.
- You could adopt (yeah yeah) a table based aproach which ensures there are no cross browser compatibility issues.