CKEditor with jQuery...set XHTML output

Hi there

Sorry for the stupid question, but I really can't figure it out. No problem by setting the editor "normally" (without jQuery) to XHTML...but how may I change the output to XHTML with a jQuery start?

I run the editor with the following code:

 
           //Load ckeditor()
            $('#cketextarea').ckeditor();
            $('#cketextarea') 
              .ckeditor( function() { /* unimportant Callback Code */ }, { skin : 'office2003' } );

It also doesn't change the skin. Well, that's really not important, because I don't want to have the office skin at all, but it's kinda strange anyway.

Thanks in advance!
Max