<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>系统时间对象</title>
<style>
</style>
<script>
window.onload=function(){
var oBody=document.body;
setInterval(fnTime,1000);
fnTime();
function fnTime(){
var myTime=new Date();
var iYear=myTime.getFullYear();
var iMonth=myTime.getMonth()+1;
var iDate=myTime.getDate();
var iWeek=myTime.getDay();
var iHours=myTime.getHours();
var iMin=myTime.getMinutes();
var iSec=myTime.getSeconds();
var str=‘‘;
if(iWeek===0) iWeek=‘星期日‘;
if(iWeek===1) iWeek=‘星期一‘;
if(iWeek===2) iWeek=‘星期二‘;
if(iWeek===3) iWeek=‘星期三‘;
if(iWeek===4) iWeek=‘星期四‘;
if(iWeek===5) iWeek=‘星期五‘;
if(iWeek===6) iWeek=‘星期六‘;
str=iYear+‘年‘+iMonth+‘月‘+iDate+‘日‘+iWeek+‘ ‘+toTwo(iHours)+‘:‘+toTwo(iMin)+‘:‘+toTwo(iSec);
oBody.innerHTML=str;
}
}
function toTwo(n){
return n<10?‘0‘+n:‘‘+n;
}
</script>
</head>
<body>
</body>
</html>
原文：http://www.cnblogs.com/ll-taj/p/6594389.html