js实现本地时间同步功能

来源：奥特财经网

本文实例为大家分享了js实现本地时间同步的具体代码，供大家参考，具体内容如下

HTML代码

<html>
<head>
 <title>时间</title>
 <meta charset="utf-8">
</head>
<body onload="getTime()">
 <span id="nowDateTimeSpan" ></span> 
</body>
</html>

js代码

//时间
function getTime(){
 var ndate = new Date();
 var nyear = ndate.getFullYear();
 var nmonth = ndate.getMonth()+1;
 var nday = ndate.getDate(); 
 var nhour = ndate.getHours();
 var nminute = ndate.getMinutes();
 var nsecond = ndate.getSeconds();
 // 如果分钟或小时的值小于10，则在其值前加0，比如如果时间是下午3点20分9秒的话，则显示15：20：09
 nmonth=checkTime(nmonth);
 nday=checkTime(nday);
 nminute=checkTime(nminute); 
 nsecond=checkTime(nsecond); 
 document.getElementById('nowDateTimeSpan').innerHTML=nyear+"-"+nmonth+"-"+nday+" "+nhour+":"+nminute+":"+nsecond;
 document.getElementById('nowDateTimeSpan1').innerHTML=nyear+"-"+nmonth+"-"+nday+" "+nhour+":"+nminute+":"+nsecond;
 document.getElementById('nowDateTimeSpan2').innerHTML=nyear+"-"+nmonth+"-"+nday+" "+nhour+":"+nminute+":"+nsecond;
 document.getElementById('nowDateTimeSpan3').innerHTML=nyear+"-"+nmonth+"-"+nday+" "+nhour+":"+nminute+":"+nsecond;
 document.getElementById('nowDateTimeSpan4').innerHTML=nyear+"-"+nmonth+"-"+nday+" "+nhour+":"+nminute+":"+nsecond; 
 //setTimeout('getTime()',1000);//每一秒中重新加载startTime()方法
 function checkTime(i){ 
 if (i<10){
 i="0" + i;
 } 
 return i;
 }
}