submit_tag (ActionView::Helpers::FormTagHelper)

    # File lib/action_view/helpers/form_tag_helper.rb, line 120
          def submit_tag(value = "Save changes", options = {})
            options.stringify_keys!

            if disable_with = options.delete("disable_with")
              options["onclick"] = "this.disabled=true;this.value='#{disable_with}';this.form.submit();#{options["onclick"]}"
            end

            tag :input, { "type" => "submit", "name" => "commit", "value" => value }.update(options.stringify_keys)
          end