The index is not working properly without javascript.
With javascript on, each namespace "folder" opens when clicking on it, without reloading the page.
With javascript off, clicking on a folder should open it too, but (of course) with loading a new page.
Currently the behaviour isn't that way, clicking on a folder with javascript off opens the starting-page for that namespace. This is because the link for that folder in the index is e.g:
http://www.dokuwiki.org/dokuwiki?idx=config
but should be
http://www.dokuwiki.org/dokuwiki?idx=config&do=index
A patch which fixes this is attached, though it is probably not the "right" solution.