authenticate users using windows authentication

[sean nakasone]

I'm a javascript newbie and trying to modify a javascript code so that it
will authenticate the user and popup a warning if necessary and restrict
access. We have a purely Microsoft Implementation, the website is using
an IIS server, the clients are IE, we have a Windows Domain and we want to
restrict the website to members of the MyGroup group.

I know the web.config has an authentication section in it, but we don't
want to perform any authentication in there because of a third
party software bug, so I am investigating whether I can perform authentication elsewhere,
hopefully in javascript code.

Could you please provide suggestions and I would really appreciate code
snippets.