HElp With coding

hi im opeing a new site and i wish to incoperate a drop down list with the themes on i dont have a clue how:S..Please help if you have code or can help

+Rep

You wan't to make a CSS drop down list to display CSS Color scheme changes?
Basically...?

http://dynamicdrive.com/dynamicindex...etswitcher.htm
;).

thanks :)