<script type="text/javascript" charset="utf-8"> 
  $(document).on('ready pjax:complete',function() {
 
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // Define some "Choose" text
    var choosetext = 'Please choose...';
 
    // Number of visible rows
    var rowCount = $('tr.answer-item:visible', thisQuestion).length;
 
    // Loop through all drop-downs
    $('tr.answer-item select', thisQuestion).each(function(i) {
 
      // Reset if value is above the number of visible rows
      if($(this).val() > rowCount) {
        $(this).prepend('<option value="">'+choosetext+'</option>').val('');
        checkconditions(this.value, this.name, this.type);
      }
 
      // Remove all unnecessary options
      $('option', this).filter(function() {
        return this.value > rowCount;
      }).remove(); 
    });
 
    // Listener on the dropdowns
    $('tr.answer-item select', thisQuestion).on('change', function(e) {
      // Handle non-unique answers
       handleDuplicates();
    });
 
    function handleDuplicates() {
      $('.question-item', thisQuestion).removeClass('duplicate-row');
      $('tr.answer-item select', thisQuestion).each(function(i) {
        if(!$(this).closest('.question-item').hasClass('duplicate-row') &amp;&amp; $(this).val() != '') {
          var thisSelect = $(this);
          var selectedValue = $(this).val();
          $('tr.answer-item select', thisQuestion).not(this).each(function(i) {
            if($(this).val() == selectedValue) {
              $(this).closest('.question-item').addClass('duplicate-row');
              $(thisSelect).closest('.question-item').addClass('duplicate-row');
            }
          });
        }
      });
    }
    handleDuplicates();
 
    //Insert new style rules
    var newStyle = '<style type="text/css">\
              .duplicate-row { background-color: #E74C3C; }\
              .duplicate-row .answertext { color: #FFFFFF; }\
            </style>';    
    $("head link[rel='stylesheet']").last().after(newStyle);
  });
</script>