zc100/application/admin/template/public/footer.htm

<div id="goTop">
    <a href="JavaScript:void(0);" id="btntop">
        <i class="fa fa-angle-up"></i>
    </a>
    <a href="JavaScript:void(0);" id="btnbottom">
        <i class="fa fa-angle-down"></i>
    </a>
</div>

<script type="text/javascript">
    $(document).ready(function(){
        $('#think_page_trace_open').css('z-index', 99999);
    });
</script>
</body>
</html>