<script type="text/javascript" charset="utf-8">
 
  $(document).on('ready pjax:scriptcomplete',function(){
 
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // Create an array of dropdown option text values
    var optionTexts = [];
    $('select.form-control:eq(0) option', thisQuestion).each(function(i) {
      if($(this).val() != '') {
        optionTexts.push($.trim($(this).text()));
      }
    });
 
    // Sort the array
    optionTexts.sort(function (a, b) {
      return a.toLowerCase().localeCompare(b.toLowerCase());
    });
 
    //Loop through the option texts and insert the corresponding drop-down options
    $.each(optionTexts, function(key, val) {
 
      $('select.form-control:eq(0) option', thisQuestion).filter(function() {
        return $.trim($(this).text()).toLowerCase() == val.toLowerCase();
      }).appendTo($('select.form-control:eq(0)', thisQuestion));
    });
    });
</script>