text: // Retrieve the datapoint's ID from URL and populate field in form automatically.
  $(document).ready(function() {
      var dp_pk = getQueryVariable('datapoint');
      $("#id_datapoint").val(dp_pk);
  
  });
  
  function getQueryVariable(variable) {
      var query = window.location.search.substring(1);
      var vars = query.split('&');
      for (var i = 0; i < vars.length; i++) {
          var pair = vars[i].split('=');
          if (decodeURIComponent(pair[0]) == variable) {
              return decodeURIComponent(pair[1]);
          }
      }
      console.log('Query variable %s not found', variable);
  }
  