See: -http://www.businessinfo.co.uk/labs/jsreg/jsreg.html
A former sandbox was insecure because the demo had been compromised by sirdarckcat through XSS -http://www.businessinfo.co.uk/labs/sandbox/entry.php (well NoScript add-on protects against this in fx as does NotScripts in combination with Better Pop up Blocker extensions in Google Chrome),
polonus
P.S. On checking some JScode all works well, error log for instance gave: Description:Syntax error
Msg:Unexpected token (
D