title: Run javascript as the form is being filled by users
body: <p>I am new to Google Apps Script and need help. I am trying to achieve the following:</p>
  <p>Set a trigger for lost-focus of a textbox in Google Forms. The code in this event will be</p>
  <ol>
  <li>Get the value of a textbox</li>
  <li>Set the value of a textbox</li>
  </ol>