$(function(){
 var $radios = $('input[type="radio"]');
$radios.click(function () {
  var $this = $(this);
  if ($this.data('checked')) {
    this.checked = false;
  }
  var $otherRadios = $radios.not($this).filter('[name="'
                                               + $this.attr('name') + '"]');
  $otherRadios.prop('checked', false).data('checked', false);
  $this.data('checked', this.checked);
});
});

<script type="text/javascript" data-author="Tony Partner">
 
    $(document).on('ready pjax:scriptcomplete',function(){
 
        // Identify this question
        var thisQuestion = $('#question{QID}');
 
        // A function to toggle radio inputs
        function toggleRadio(thisCell) {
            if($(':radio:checked', thisCell).length == 0) {
                $(':radio', thisCell).trigger('click');
            }
            else {
                $(':radio:eq(0)', thisCell).prop('checked', false);
                checkconditions('', $(':radio:eq(0)', thisCell).attr('name'), 'radio');
            }
        }
 
        // Listener on the radio inputs
        $(':radio', thisQuestion).on('click', function(e) {
            e.stopPropagation();
        });
 
        // Listener on the array cells
        $('.answer-item', thisQuestion).on('click', function(e) {
            e.stopPropagation();
            toggleRadio(this);
        });
 
        // Listener on the labels
        $('.answer-item label', thisQuestion).on('click', function(e) {
            e.preventDefault();
            e.stopPropagation();            
            toggleRadio($(this).closest('.answer-item'));
        });
    });
</script>

<script type="text/javascript" data-author="Tony Partner">
 
    $(document).on('ready pjax:scriptcomplete',function(){
 
        // Identify this question
        var thisQuestion = $('#question{QID}');
 
        // Listener on the radio inputs
        $(':radio', thisQuestion).css('left', '-9999em').on('click', function(e) {
            e.stopPropagation();
        });
 
        // Listener on the labels
        $('.answer-item label', thisQuestion).on('click', function(e) {
            e.preventDefault();
            var thisItem = $(this).closest('.answer-item');
            if($(':radio:checked', thisItem).length == 0) {
                $(':radio', thisItem).trigger('click');
            }
            else {
                $(':radio:eq(0)', thisItem).prop('checked', false);
                checkconditions('', $(':radio:eq(0)', thisItem).attr('name'), 'radio');
            }
        });
    });
</script>