<script type="text/javascript" charset="utf-8">    
$(document).ready(function() {  
 
    // Identify the questions
    var thisQuestion = $('#question{QID}');
    var thisQuestionID = {QID};
    var qHidden = thisQuestion.nextAll('.multiple-short-txt:eq(0)');
    var hiddenInput1 = $('input.text:eq(0)', qHidden);
    var hiddenInput2 = $('input.text:eq(1)', qHidden);
    var qHidden2 = thisQuestion.nextAll('.multiple-opt:eq(0)');
    var qHidden2ID = qHidden2.attr('id').replace(/question/, '');
 
    // Hide the control questions
    qHidden.hide();
    qHidden2.hide();
 
    // Listener on the checkboxes
    $('input.checkbox', thisQuestion).on('change', function(e) {
      handleChecked();
    });
 
    function handleChecked() {
      // Build an array of checked sub-question codes
      var checkedAnswers = [];
      $('input.checkbox:checked', thisQuestion).each(function(i) {
        var thisSQCode = $(this).attr('id').split('X'+thisQuestionID)[1];
        checkedAnswers.push(thisSQCode);
      });
 
      // Shuffle the array
      shuffleArray(checkedAnswers);
 
      // Reset the hidden multi-choice
      $('input.checkbox', qHidden2).each(function(i) {
        $(this).prop('checked', false);
        $(this).nextAll('input:hidden:eq(0)').val('');
      });
 
      // Load the hidden questions with 2 random items from the visible multi-choice
      $(hiddenInput1).val($.trim($('.question-item[id$="X'+thisQuestionID+checkedAnswers[0]+'"] .label-text').text()));
      $('input.checkbox[id$="X'+qHidden2ID+checkedAnswers[0]+'"]', qHidden2).trigger('click');
      if(checkedAnswers.length > 1) {
        $(hiddenInput2).val($.trim($('.question-item[id$="X'+thisQuestionID+checkedAnswers[1]+'"] .label-text').text()));
        $('input.checkbox[id$="X'+qHidden2ID+checkedAnswers[1]+'"]', qHidden2).trigger('click');
      }
      else {
        $(hiddenInput2).val('');
      }
 
      // Fire Expression Manager
      checkconditions(hiddenInput1.value, hiddenInput1.name, hiddenInput1.type);
      checkconditions(hiddenInput2.value, hiddenInput2.name, hiddenInput2.type);
      $('input.checkbox', qHidden2).each(function(i) {
        checkconditions(this.value, this.name, this.type);
      });
    }
    });
 
  function shuffleArray(array) {
    for (var i = array.length - 1; i > 0; i--) {
      var j = Math.floor(Math.random() * (i + 1));
      var temp = array[i];
      array[i] = array[j];
      array[j] = temp;
    }
    return array;
  }
</script>