[% USE HTML %]
 <form action="bankaccounts.pl" method="post">
  <p>
   New bank account<br>
   <input type="submit" value="Add">
  </p>

  <input type="hidden" name="action" value="bank_account_add">
  <input type="hidden" name="callback" value="[% HTML.escape(callback) %]">
 </form>