编辑您的代码：
<html>
<head>
<script type="text/javascript">
function startTime()
{
var today=new Date()
var yy=today.getFullYear()
var mm=today.getMonth()+1
var dd=today.getDate()
var h=today.getHours()
var m=today.getMinutes()
var s=today.getSeconds()
// add a zero in front of numbers<10
m=checkTime(m) s=checkTime(s)
document.getElementById(‘txt‘).innerHTML=yy+"-"+mm+"-"+dd+" "+h+":"+m+":"+s
t=setTimeout(‘startTime()‘,500)
}
function checkTime(i)
{
if (i<10)
{
i="0" + i
}
return i
}
</script>
</head>
<body onload="startTime()">
<div id="txt"></div>
</body>
</html>
查看结果:
2015-1-13 00:00:00
在网页上显示一个钟表(yyyy-mm-dd hh:mm:ss)
原文：http://www.cnblogs.com/zifashaonian10000/p/4221805.html