Things like this.show.arguments strike me as some sort of Java script directive probably to put you onto some sort of dodgy website
I've taken a look at the Virus data (
http://www.sophos.com) which does not list any of them as a virus so I think you are quite safe!
Another suggestion I would make is to check out
http://www.grisoft.com, A far more superior AV tool than Norton with more regualr updates and best of all it's free!!!
--
Gary Williams.