<html>
<body>
<form method="POST" action="done.html" onsubmit="return true;" id="testform">
  <input type="text" id="username_field" name="username_field" value="username">
  <input type="password" id="password_field"
         name="password_field" value="password">
  <input type="submit" id="input_submit_button" name="input_submit_button">
</form>
</body>
</html>