JS定时器时间日期钟表

window.onload=function(){
                        setTime();
                        setInterval('setTime()',1000);
                    }
                    function checkTime(n){
                          if(n<10){
                               return  "0" +n;
                          }else{
                              return ""+n;
                          }
                    }
                    function setTime(){
                           var date=new Date();
                           var  h=checkTime(date.getHours());
                           var  m=checkTime(date.getMinutes());
                           var  s=checkTime(date.getSeconds());
                           var time=document.getElementById('time');
                            time.innerHTML=h+":"+m+":"+s;
                    }





<body>
        <div id="time"></div>
</body>

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原文地址：https://www.cnblogs.com/kangshuai/p/7149305.html