<script type="text/javascript" data-author="Tony Partner">
 
  $(document).on('ready pjax:scriptcomplete',function(){
 
    var thisQuestion = $('#question{QID}');
 
    // Add column and row specific classes
    $('tr.subquestion-list', thisQuestion).each(function(i) {
      var rowIndex = i;
      $('th, td', this).each(function(i) {
        $(this).addClass('column-'+i+' row-'+rowIndex).attr('data-column', i).attr('data-row', rowIndex);
      });
    });
 
    // Add some classes to the checkbox cells
    $('tr.subquestion-list .answer-item:last-child', thisQuestion).addClass('exclusive-item row-exclusive');
    $('tr.subquestion-list:last .answer-item', thisQuestion).addClass('exclusive-item column-exclusive');
 
    // A listener on the checkboxes
    $('.answer-item input[type="checkbox"]', thisQuestion).change(function (event) {
      handleExclusive($(this).closest('.answer-item'));
    });
 
    function handleExclusive(thisCell) {
 
      var thisCheckBox = $(':checkbox', thisCell);
 
      if(thisCheckBox.is(':checked')) {
 
        var thisRow = $(thisCell).attr('data-row');
        var thisColumn = $(thisCell).attr('data-column');
 
        // Define items to be unchecked
        excludeCells = $('.exclusive-item[data-column="'+thisColumn+'"], .exclusive-item[data-row="'+thisRow+'"]');
        if(thisCell.hasClass('row-exclusive')) {
          excludeCells = $('.answer-item[data-row="'+thisRow+'"]').not(thisCell);
        }
        if(thisCell.hasClass('column-exclusive')) {
          excludeCells = $('.answer-item[data-column="'+thisColumn+'"]').not(thisCell);
        }
 
        // Uncheck those items
        $(excludeCells).each(function(i) {          
          $('input:hidden', this).val('');
          $(':checkbox', this).prop('checked', false).trigger('change');
        });
      }
    }
 
    // Remove checkbox in last row, last column
    $('tr.subquestion-list:last .answer-item:last-child *', thisQuestion).remove();
  });
</script>