# File lib/cgikit.rb, line 1516
                def check_undefined_attributes( *attrs )
                        attrs.flatten!
                        attrs << 'oid'
                        attrs << 'element'

                        attr = name = nil
                        definition.each_key do | attr |
                                if ( attrs.include? attr ) == false then
                                        raise AttributeError, \
                                        "Attribute '#{attr}' is undefined attribute - #{name_with_class}"
                                end
                        end
                end