# File lib/action_view/helpers/form_tag_helper.rb, line 499
      def image_submit_tag(source, options = {})
        options.stringify_keys!

        if confirm = options.delete("confirm")
          options["data-confirm"] = confirm
        end

        tag :input, { "type" => "image", "src" => path_to_image(source) }.update(options.stringify_keys)
      end