<div>
  <form id="contact" action="" method="post">
      <h3 style="margin-top: -5px;">Kontakt os</h3>
     <p id="close1">  <a href="javascript:void(0)" onclick="toggle_visibility('popupBoxFourPosition');">  x   </a>   </p>

    <fieldset>
      <input placeholder="Dit Navn" type="text" tabindex="1" required autofocus>
    </fieldset>
    <fieldset>
      <input placeholder="Din E-mailadresse" type="email" tabindex="2" required>
    </fieldset>
    <fieldset>
      <input placeholder="Dit telefonnummer" type="tel" tabindex="3" required>
    </fieldset>

    <fieldset>
      <textarea placeholder="Meddelelse..." tabindex="5" required></textarea>
    </fieldset>
    <fieldset>
      <button name="submit" type="submit" id="contact-submit" data-submit="...Sender">Submit</button>
    </fieldset>

  </form>
</div>