Using Firefox, I opened the "javascript:" pseudo-URL to get the javascript console. What I get is a window that looks like the standard error console. When I attempt to edit a wiki page, I see the error:
Error: syntax error
Source File:
http://www.big-8.org/dokuwiki/lib/exe/js.php?edit=1&write=1
Line: 1
Which doesn't tell me a whole lot.