<script type="text/javascript" charset="utf-8">
  $(document).ready(function() {
    // Call the exclude function using question ID
    excludeOpt({QID});
  });
 
  // A function to make the last option in each array row exclusive
  function excludeOpt (qID) {
 
    var thisQuestion = $('#question'+qID)
 
    // Add some classes to the checkbox cells
    $('td.checkbox-item', thisQuestion).addClass('normal-item');
    $('tr.subquestion-list', thisQuestion).each(function(i) {
      $('.normal-item:last', this).removeClass('normal-item').addClass('exlusive-item')
    });
 
    // A listener on the checkboxes
    $('input[type="checkbox"]', thisQuestion).on('change', function (event) {
      handleExclusive($(this).closest('td'));
    });
 
    function handleExclusive(thisCell) {
 
      var thisRow = $(thisCell).closest('tr');
 
      // Uncheck the appropriate boxes in a row
      if ($(thisCell).hasClass('normal-item')) {
        $('.exlusive-item input[type="checkbox"]', thisRow).prop('checked', false);
      }
      else {
        $('.normal-item input[type="checkbox"]', thisRow).prop('checked', false);
      }
 
      // Check conditions (relevance)
      $('td.checkbox-item', thisRow).each(function(i) {
        var thisValue = '';
        if($('input[type="checkbox"]', this).is(':checked')) {
          thisValue = 1;
        }
        var thisSGQA = $('input[type="checkbox"]', this).attr('id').replace(/cbox_/, '');
 
        $('input[type="hidden"]', this).attr('value', thisValue);
        fixnum_checkconditions(thisValue, thisSGQA, 'hidden');
      });
    }
  }
</script>