select_month (ActionView::Helpers::DateHelper)

    # File lib/action_view/helpers/date_helper.rb, line 500
          def select_month(date, options = {}, html_options = {})
            val = date ? (date.kind_of?(Fixnum) ? date : date.month) : ''
            if options[:use_hidden]
              hidden_html(options[:field_name] || 'month', val, options)
            else
              month_options = []
              month_names = options[:use_month_names] || (options[:use_short_month] ? Date::ABBR_MONTHNAMES : Date::MONTHNAMES)
              month_names.unshift(nil) if month_names.size < 13
              1.upto(12) do |month_number|
                month_name = if options[:use_month_numbers]
                  month_number
                elsif options[:add_month_numbers]
                  month_number.to_s + ' - ' + month_names[month_number]
                else
                  month_names[month_number]
                end

                month_options << ((val == month_number) ?
                  content_tag(:option, month_name, :value => month_number, :selected => "selected") :
                  content_tag(:option, month_name, :value => month_number)
                )
                month_options << "\n"
              end
              select_html(options[:field_name] || 'month', month_options.join, options, html_options)
            end
          end