text: window.addEventListener('load', function () {
      const doc = document;
      let isSubmit = true;
      
      doc.getElementById('myForm').addEventListener('submit', function(evt) {
          evt.preventDefault();
          if (isSubmit) {
              isSubmit = false;
              new checkUserData(this).processData();
              isSubmit = true;
          }
      });
  });