text: $(document).ready(function(){
      $('input[data-grav-field-datetime]').each(function() {
          var $input = $(this),
              min = $input.attr('min'),
              max = $input.attr('max'),
              regex, match,
              kendoOptions = { format: "dd-MM-yyyy HH:mm", timeFormat: "HH:mm" };
  
          if (min || max) {
              regex = /(\d{2})-(\d{2})-(\d{4}) (\d{2}):(\d{2})/;
          }
  
          if (min && (match = regex.exec(min))) {
              kendoOptions.min = new Date(
                  (+match[3]),
                  (+match[2])-1,
                  (+match[1]),
                  (+match[4]),
                  (+match[5])
              );
          }
  
          if (max && (match = regex.exec(max))) {
              kendoOptions.max = new Date(
                  (+match[3]),
                  (+match[2])-1,
                  (+match[1]),
                  (+match[4]),
                  (+match[5])
              );
          }
  
          $input.kendoDateTimePicker(kendoOptions);
  
          // Reset when user manually types in invalid date
          $input.on('change', function () {
              $input.css('opacity', 1);
              $input.parents('.form-data').css('opacity', 1);
              var kWidget = $input.data('kendoDateTimePicker');
              if (kWidget && kWidget.value() === null && $input.val()) {
                  kWidget.value($input.data('kendo-previous') || "");
              } else {
                  $input.data('kendo-previous', kWidget.value() || "");
              }
          });
      });
  });
  