经典的在网页上适时显示时间，能显示到秒钟，成一行布局，节省网页布局空间，直接拷到网页里就生效了
代码如下：
<html>
<head>
<title>网页上适时显示的时间</title>
<meta http-equiv="content-Type" content="text/html;charset=utf-8">
</head>
<body onload="startclock()">
<form name="clock">
<script language="JavaScript">
var timerID = null;
var timerRunning = false;
function stopclock (){
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;}
function startclock () {
stopclock();
showtime();}
function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
var timeValue = now.getFullYear()+"年"+(now.getMonth()+1)+"月"+now.getDate()+"日" +((hours >= 12) ? " 下午 " : " 上午 " )
timeValue += ((hours >12) ? hours -12 :hours)
timeValue += ((minutes < 10) ? ":0" : ":") + minutes
timeValue += ((seconds < 10) ? ":0" : ":") + seconds
document.clock.thetime.value = timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;}
</script>
<input name="thetime" style="font-size:9pt;border:1px solid #FFFFFF;" size="28">
</form>
</body>
</html>效果如图：
