I fugured it out myself, it worked, but not correctly.
My sidebar went down when I inserted the code. My code:
[71 lines of code moderated as per the Forum Rules. The maximum number of lines of code that you can post in these forums is ten lines. Please use the pastebin]
A question: I want to set an height. I inserted 15 tabs and they're not the full height of the accordion height. There's a lot of empty space. Another question: can I remove the space on the top and on the bottom? There are little spaced between the first tab and the top. On the bottom there's a black line, and after that there is an empty tab space again.
p.s. I posted this message on your website as well.