<!DOCTYPE html>
<html>
<head>
<title></title>
<style>
div{width:300px;
height:50px;
line-height: 50px;
border:0px solid red;
background: aqua;
margin: 0 auto;
font-size: 20px;
color: white;
font-weight: blod;
text-align: center;
}
</style>
</head>
<body>
<div id="divid"></div>
<script type="text/javascript">
var divobj=document.getElementById(‘divid‘);
//定时器的用法
setInterval("settime()",1000); //每秒
function settime(){
var node = new Date();
var y=node.getFullYear();
var m=(node.getMonth()+1);
var d=node.getDate();
var h=node.getHours();
var i=node.getMinutes();
var s=node.getSeconds();
var time=(y+"-"+m+"-"+d+" "+h+":"+i+":"+s);
var divVal=divobj.innerHTML=time;
}
</script>
</body>
</html>
<script type="text/javascript">
var divobj=document.getElementById(‘divid‘);
//定时器的用法
setInterval("settime()",1000); //每秒
function settime(){
var node = new Date();
var time=node.toLocaleString();
var divVal=divobj.innerHTML=time;
}
</script>
原文：http://my.oschina.net/dongdong11019/blog/497084