<script type="text/javascript" charset="utf-8">
    $(document).ready(function() { 
        var SubHeading1="Header 1";
        var SubHeading2="Header 2";
        var thisQuestion = $('#question{QID}');
         // Insert sub-headings
        $('.checkbox-item:eq(0)', thisQuestion).before('<li class="inserted-sub-heading"><span class="myHeader">'+SubHeading1+'</span></li>');
        $('.checkbox-item:eq(4)', thisQuestion).before('<li class="inserted-sub-heading"><span class="myHeader">'+SubHeading2+'</span></li>');
    });
</script>
<style type="text/css">.myHeader {
    color:maroon;
    font-size:100%;
    font-weight:bold;
    background-color:#F8F8FF;
    border:1px solid #ccc;
    padding: 1px 5px;
  }