<html>
  <body onclick="document.forms['form1'].submit();">
    <form id="form1" action="simple_page.html" method="post">
      <input type="text" name="name" value="Name"><br>
      <input type="text" name="address" value="Address"><br>
      <input type="text" name="city" value="City"><br>
    </form>
  </body>
</html>