<script type="text/javascript">

             setInterval(function(){

                 var myDate = new Date();

                 var $_year = myDate.getFullYear();

                 var $_month = parseInt(myDate.getMonth())+1;

                 var $_day = myDate.getDate();

                 var $_hour = myDate.getHours();

                 var $_minute = myDate.getMinutes();

                 var $_second = myDate.getSeconds();

                 if ($_hour < 10) {

                     $_hour = "0" + $_hour;

                 }

                 if ($_minute < 10) {

                     $_minute = "0" + $_minute;

                 }

                 if ($_second < 10) {

                     $_second = "0" + $_second;

                 }

                 var $_f_date2 = $_year +"年"+$_month+"月"+$_day+"日"+" "+$_hour+":"+$_minute+":"+$_second;

                 time.innerHTML = $_f_date2;

             },1000)  //每过1秒运行一次

             </script>