Anyone got a JavaScript CAS client library?

[Mark McLaren]

Hello,

I am thinking about writing a Firefox toolbar extension (using
JavaScript, XUL, XPCOM, E4X and such).  I want it to detect if a user
has logged in (and behave appropriately) and to be able to obtain the
logged in username.  I was hoping somebody might have written a 100%
JavaScript CAS client library that they would be willing to share with
me?

Thanks,

Mark

-- 
"Paradoxically, the more time saving abstractions you are using the
more you actually have to know." - Simon Willison