I have a problem: I want to redirect via JavaScript to a directory above.

You can do a relative redirect:

{code}document.location.href = '../'; //one level up{/code}Or{code}document.location.href = '/path'; //relative to domain{/code}

• see why you should use window.location.replace stackoverflow.com/questions/503093/…
• When you want to simulate a link, you should use window.location.href. You should only use window.location.replace when you want to simulate an http redirect (thus not generating a history item).
• By the way, document.location was intended as a read-only property. It is safer to use window.location. See this question.
• If you use location.path you will get your domain.com part. Then location.pathname will give you /path/folder. I would split location.pathname by / and reassemble the URL. But unless you need the querystring, you can just redirect to .. to go a directory above.