JS数字时钟

            <span id="datetime"></span>
            <script>
            function setTime(){
            var day="";
            var month="";
            var ampm="";
            var ampmhour="";
            var myweekday="";
            var year="";
            var myHours="";
            var myMinutes="";
            var mySeconds="";
            mydate=new Date();
            myweekday=mydate.getDay();
            mymonth=parseInt(mydate.getMonth()+1)<10?"0"+(mydate.getMonth()+1):mydate.getMonth()+1;
            myday= mydate.getDate();
            myyear= mydate.getYear();
            myHours = mydate.getHours();
            myMinutes = mydate.getMinutes();
            mySeconds = parseInt(mydate.getSeconds())<10?"0"+mydate.getSeconds():mydate.getSeconds();
            year=(myyear > 200) ? myyear : 1900 + myyear;
            if(myweekday == 0)      weekday=" 星期日 ";
            else if(myweekday == 1)      weekday=" 星期一 ";
              else if(myweekday == 2)      weekday=" 星期二 ";
              else if(myweekday == 3)      weekday=" 星期三 ";
              else if(myweekday == 4)      weekday=" 星期四 ";
              else if(myweekday == 5)      weekday=" 星期五 ";
              else if(myweekday == 6)      weekday=" 星期六 ";
              datetime.innerText=year+"年"+mymonth+"月"+myday+"日 "+myHours+":"+myMinutes+":"+mySeconds+" "+weekday;  setTimeout("setTime()",1000);
              }  setTime();
             </script>