Sorry about that - I wanted to "name and shame" rather than endanger.
I'm not sure what the Trojan is - I'm guessing that JS means JavaScript, and thus it's installed through a JaveScript prompt - so if you didn't click "yes" then I should suspect no foul.
Even if you did get infected, as the site is AIM orientated, I'd figure it's for compromising user machines via their AIM connections, so I'd probably recommend not using AIm for a little while, until you're sure.
I *know* there are some good online Virus checkers available, but I can't think of any at the moment.
NOTE: just checked the Symantec site - try this:
http://security.symantec.com/sscv6/default.asp?langid=ie&venid=sym