     # point to class_code selector
     @$class_code                      = @$section.find '.wrapper-member-select'
     @$class_code_select               = @$class_code.find '.member-lists-selector'
-    @$arrange_by_select               = @$section.find("input[name='download-class-submissions-arrange_by']")
     
     # response areas
     @$download                        = @$section.find '.data-download-container'

        type: 'GET'
        dataType: 'json'
        url: url
        data: {class_code: @$class_code_select.val(),arrange_by: @$arrange_by_select.val()}
        error: (std_ajax_err) =>
          @$reports_request_response_error.text errorMessage
          $(".msg-error").css({"display":"block"})

        dataType: 'json'
        url: url
        aync: false
        data: {class_code: @$class_code_select.val(), arrange_by: @$section.find("input[name='download-class-submissions-arrange_by']:checked").val()}
        error: (std_ajax_err) =>
          @$reports_request_response_error.text errorMessage
          $(".msg-error").css({"display":"block"})
