Ok, the poster of that question might not know about the differences between Perl, perl and PerlScript, but that would be just one more reason to learn it quickly :-)
Btw. It's quite cool to do the client side scripting stuff in Perl as well, ok even if its at this state just more experimental :-) It's easier to convince people of getting the newest Macromed.. whatever plugin for their browser instead of telling em to please install the most dangerous tool namely Perl (due to its powers) on a Windows-Pc (which should fear anything except plain text).

Have a nice day
All decision is left to your taste