<div id="datetime">
         <script>
             // setInterval("document.getElementById('datetime').innerHTML=new Date().toLocaleString();", 1000);                                            //展示本地时间
             setInterval("document.getElementById('datetime').innerHTML=(new Date(new Date().getTime() - 8 * 60 * 60 *1000)).toLocaleString();", 1000);  //展示UTC时间
         </script>
    </div>