I made it possible for the user to change css-file in my gallery. But how can I make the header change to?
Not sure what you mean. Post a link and point out examples.
http://www.folket.de/cpg144/index.php this is my gallery. On the top right you can see the writing "fargetema: Grønn Rosa". If you press the link "Rosa" , the page turn pink. But the header remains the same. I got i pink header to, but how does i make it change with the rest? Thank you for your help.
OK, I see. Instead of switching css files, I would suggest having two themes that have different css files and a different header file. You can then change the links to http://www.folket.de/cpg144/?theme=green to see the green version.
OK. thank you :). But is there any way to set cookies or something, so the users automaticly uses the page they used last time?
That would be handled automagically by the theme system.
It doesnt happend automaticly to me. If I use the pink theme, close the browser, open the browser and go to the gallery again, it uses the green theme.
You are changing the domain name with the links.
<a href="http://folket.de/cpg144/?theme=classic">Grønn</a>
<a href="http://folket.de/cpg144/?theme=rosa">Rosa</a>
use
<a href="index.php?theme=classic">Grønn</a>
<a href="index.php?theme=rosa">Rosa</a>
Oh. Thank you so much. Exactly what I wanted. Solved! :)