On the ez.no webpage there seems to be an javascript that changes some class and style information for some elements in the webpage. You don't need any ajax as you do not make a request to the server, you just change the css. Something similar is described here: http://alistapart.com/comments/switchymclayout/ , but please read also the discussion for this article as the approach described there is far from being perfect. Still - it should give you an idea on how to tackle this problem. Of course you can always have a look at the javascript and css used on the ez.no site (be careful not to violate any copyrights though).
Claudia
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