在网页上显示一个时时刷新的时钟，含有毫秒
<html>
<head>
<script type="text/javascript">
function startTime()
{
var today=new Date()
var h=today.getHours()
var m=today.getMinutes()
var s=today.getSeconds()
var ms=today.getMilliseconds()
// add a zero in front of numbers<10
m=checkTime(m)
s=checkTime(s)
ms=checkTime2(ms);
document.getElementById('txt').innerHTML=h+":"+m+":"+s+":"+ms;
t=setTimeout('startTime()',50)
}
function checkTime(i)
{
if (i<10)
{i="0" + i}
return i
}
function checkTime2(i)
{
if (i<10)
{i="00" + i;return i;}
if (i<100)
{i="0" + i;return i;}
return i;
}
</script>
</head>
<body onload="startTime()">
<div align="center">
<font color="#009900" size="+7">
<div id="txt"></div>
</font>
</div>
</body>
</html>
