# File lib/cgikit.rb, line 1791
        def variable?( string )
                if ( string == 'true' )   or ( string == 'false'  ) or \
                   ( string == 'nil'  )   or ( string =~ /"(.*)"/ ) or \
                   ( string =~ /'(.*)'/ ) or \
                   ( ( not string =~ /[\D]/ ) and ( string =~ /[\d]/ ) ) or \
                        ( self.respond_to?("#{string}=") == false ) then
                        false
                else
                        true
                end
        end