Mark, Thanks! If only I weren't teaching a GE (General Education = non-majors) course this term... I'm still trying to explain the difference between an email address and a URL... :-/ Judy On Wed, 21 Sep 2005, Mark Wieder wrote: > Sinners- > > I've had this filed away for a while and just rediscovered it... > > http://www.eecs.harvard.edu/~nr/sins.html