在网页上显示时间，JS代码

答案：<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>在网页上显示时间</title>
</head>
<body>
<SCRIPT language=Javascript1.2>
<!--
var tags_before_clock = "<font face='geneva, arial, helvetica, sans-seif' size='4' color='#0000FF'>现在时间："
var tags_middle_clock = "on"
var tags_after_clock  = "</font>"

if(navigator.appName == "Netscape") {
document.write('<layer id="clock"></layer><br>');
}

if (navigator.appVersion.indexOf("MSIE") != -1){
document.write('<span id="clock"></span>');
}

DaysofWeek = new Array()
  DaysofWeek[0]="Sunday"
  DaysofWeek[1]="Monday"
  DaysofWeek[2]="Tuesday"
  DaysofWeek[3]="Wednesday"
  DaysofWeek[4]="Thursday"
  DaysofWeek[5]="Friday"
  DaysofWeek[6]="Saturday"

Months = new Array()
  Months[0]="January"
  Months[1]="February"
  Months[2]="March"
  Months[3]="April"
  Months[4]="May"
  Months[5]="June"
  Months[6]="July"
  Months[7]="August"
  Months[8]="September"
  Months[9]="October"
  Months[10]="November"
  Months[11]="December"

function upclock(){
var dte = new Date();
var hrs = dte.getHours();
var min = dte.getMinutes();
var sec = dte.getSeconds();
var day = DaysofWeek[dte.getDay()]
var date = dte.getDate()
var month = Months[dte.getMonth()]
var year = dte.getFullYear()

var col = ":";
var spc = " ";
var com = ",";
var apm;

if (date == 1 || date == 21 || date == 31)
  {ender = "<sup>st</sup>"}
else
if (date == 2 || date == 22)
  {ender = "<sup>nd</sup>"}
else
if (date == 3 || date == 23)
  {ender = "<sup>rd</sup>"}

else
  {ender = "<sup>th</sup>"}

if (12 < hrs) {
apm="<font size='-1'>pm</font>";
hrs-=12;
}

else {
apm="<font size='-1'>am</font>";
}

if (hrs == 0) hrs=12;
if (hrs<=9) hrs="0"+hrs;
if (min<=9) min="0"+min;
if (sec<=9) sec="0"+sec;

if(navigator.appName == "Netscape") {
document.clock.document.write(tags_before_clock+hrs+col+min+col+sec+apm+spc+tags_middle_clock+spc+day+com+spc+date+ender+spc+month+com+spc+year+tags_after_clock);
document.clock.document.close();
}

if (navigator.appVersion.indexOf("MSIE") != -1){
clock.innerHTML = tags_before_clock+hrs+col+min+col+sec+apm+spc+tags_middle_clock+spc+day+com+spc+date+ender+spc+month+com+spc+year+tags_after_clock;
}
}

setInterval("upclock()",1000);
//-->
</SCRIPT>
</body>
</html>
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