title: Old Google Form redirect after submission
body: <p>I am looking for a solution (code) how to redirect user to a custom thank you page (not default Google's) after submitting the form with Old Google Form.</p>
  
  <pre><code>&lt;iframe name="hidden_iframe"
          id="hidden_iframe"
          style="display:none;"
          onload="if(submitted){window.location='http:/...yourthankyoupage.htm';}"&gt;
  &lt;/iframe&gt;
  &lt;form action="https://spreadsheets.google.com/formResponse?formkey=....."
        method="post"
        target="hidden_iframe"
        onsubmit="submitted=true;"&gt;
  </code></pre>
  
  <p>This code is not working. At least not for me. Any suggestions?</p>