<script type="text/javascript" charset="utf-8">    
  $(document).ready(function() {  
 
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // Assign column-specific classes
    $('table.subquestions-list tr', thisQuestion).each(function(i){
      $('> *', this).each(function(i){
        $(this).addClass('column-'+i+'');
        $(this).attr('data-column', i);
      });
    });
 
    // Define the column to have exclusive answers
    var exclusiveColumn = 4;
 
    // Listeners on the radios
    $('input.radio', thisQuestion).on('click', function(e) {
      var thisCell = $(this).closest('td');
      if($(thisCell).hasClass('column-'+exclusiveColumn)) {
        setTimeout(function () {
          $('.column-'+exclusiveColumn+' input.radio:not(:checked)', thisQuestion).prop('disabled', true);
        }, 100);
      }
      if($('.column-'+exclusiveColumn+' input.radio:checked', thisQuestion).length == 0) {
        $('.column-'+exclusiveColumn+' input.radio', thisQuestion).prop('disabled', false);
      }
    });
 
    // Initial radio state
    if($('.column-'+exclusiveColumn+' input.radio:checked', thisQuestion).length != 0) {
      $('.column-'+exclusiveColumn+' input.radio:not(:checked)', thisQuestion).prop('disabled', true);
    }
    });
</script>

countif("d",self.NAOK) <= 1