@kk,

For the time being I decided to set all the section input fields to required='0' and use js to check all the input fields if they are empty and if so, return false the submit function and show an error div just like you would on k_error.

Code: Select all
< script >
  $(document).ready(function() {
    $('.js_handled').hide();

    $('form').submit(function() {
      var input = $.trim($('.extended_form .side input').val());
      if (input === '') {
        $('.js_handled').show();
        return false;
      } else {
        $('.js_handled').hide();
      }
    });
  });
  < /script>