Possible Virus?

[Mike McMullen]

I received an email with an attachment called "grenade.html".
It consists of  Java script that defines two arrays of numbers
that it performs some "magic" on and then does a document.write
on something called "milking".

I'm not a java script person at all but this looks like a virus trying
to come in under the wire. MailScanner and ClamAV didn't
flag it as a virus.

Has anyone seen this or know what it is?

Thanks,

Mike