javascript的时钟简单问题

来源：百度知道 编辑：UC知道 时间：2024/06/19 18:16:54
为什么我这段代码无法显示时钟

<html>
<head>
<title>时钟练习</title>
</head>
<body>
<script language="JavaScript">
<!--

function Time(){
if (!document.layers&&!document.all)
return
var Timer=new Date()
var hours=Timer.getHours()
var minutes=Timer.getMinutes()
var seconds=Timer.getSeconds()
var noon="AM"
if (hours>12){
noon="PM"
hours=hours-12
}
if (hours==0)
hours=12
if (minutes<=9)
minutes="0"+minutes
if (seconds<=9)
seconds="0"+seconds

myclock="<font size='4' face='Arial' color=blue>"+hours+":"+minutes+":"
+seconds+" "+noon+"</b></font>"
if (document.layers){
document.layers.position.document.write(myclock)
document.layers.po

因为你没有调用它呀
这里
<body onload="Time()">

这样就可以了

<html>
<head>
<title>时钟练习</title>
<script language="JavaScript">
<!--

function Time(){
if (!document.layers&&!document.all)
return
var Timer=new Date()
var hours=Timer.getHours()
var minutes=Timer.getMinutes()
var seconds=Timer.getSeconds()
var noon="AM"
if (hours>12){
noon="PM"
hours=hours-12
}
if (hours==0)
hours=12
if (minutes<=9)
minutes="0"+minutes
if (seconds<=9)
seconds="0"+seconds

myclock="<font size='4' face='Arial' color=blue>"+hours+":"+minutes+":"
+seconds+" "+noon+"</b></font>"
if (document.layers){
document.layers.position.document.write(myclock)