時間和日期在電腦與網路中的顯示是多種多樣的，電腦開機有時間顯示，有些網頁中也顯示出開啟該網頁的時間以及顯示目前的時間。其實，這做起來很簡單，用JavaScript腳本語言就可以很方便地編出這樣的效果。 網頁製作中，時間和日期的各種格式的特效代碼如下:
以下是引用片段：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<TITLE>emu's date simple date formatter</TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="emu">
<META NAME="Keywords" CONTENT="date formatter format emu">
<META NAME="Description" CONTENT="A function to format Date object into String">
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
Date.prototype.format = function (format){
if (format == null) format = "yyyy/MM/dd HH:mm:ss.SSS";
var year = this.getFullYear();
var month = this.getMonth();
var sMonth = ["January","February","March","April","May","June","July","August","September","October","November","December "][month];
var date = this.getDate();
var day = this.getDay();
var hr = this.getHours();
var min = this.getMinutes();
var sec = this.getSeconds();
var daysInYear = Math.ceil((this-new Date(year,0,0))/86400000);
var weekInYear = Math.ceil((daysInYear+new Date(year,0,1).getDay())/7);
var weekInMonth = Math.ceil((date+new Date(year,month,1).getDay())/7);
return format.replace("yyyy",year).replace("yy",year.toString().substr(2)).replace("dd",(date<10?"0":"")+date ).replace("HH",(hr<10?"0":"")+hr).replace("KK",(hr%12<10?"0":"")+hr%12). replace("kk",(hr>0&&hr<10?"0":"")+(((hr+23)%24)+1)).replace("hh",(hr>0&&hr<10|| hr>12&&hr<22?"0":"")+(((hr+11)%12)+1)).replace("mm",(min<10?"0":"")+min) .replace("ss",(sec<10?"0":"")+sec).replace("SSS",this%1000).replace("a",(hr<12?"AM":" PM")).replace("W",weekInMonth).replace("F",Math.ceil(date/7)).replace(/E/g,["Sunday","Monday","Tuesday", "Wednesday","Thursday","Friday","Saturday"][day]).replace("D",daysInYear).replace("w",weekInYear).replace(/MMMM+/,sMonth).replace( "MMM",sMonth.substring(0,3)).replace("MM",(month<9?"0":"")+(month+1));
}
var d = new Date();
alert(d.format());//default format
alert(d.format("MM-dd-yyyy"));
alert(d.format("dd/MM/yy"));
alert(d.format("dd\MM\yyyy HH:mm ss.SSS"));
alert(d.format("yyyy年MM月dd日HH時mm分ss.SSS秒"));
alert(d.format("yyyy年MM月dd日E HH(0~23)時mm分ss.SSS秒"));
alert(d.format("yyyy年MM月dd日E KK(0~11)時mm分ss.SSS秒a"));
alert(d.format("yyyy年MM月dd日E hh(1~12)時mm分ss.SSS秒a"));
alert(d.format("yyyy年MM月dd日E kk(1~24)時mm分ss.SSS秒今年的第D天,第w週,MMMM這個月的第W週,MMM這個月的第F個E"));
//-->
</SCRIPT>
</BODY>
</HTML>
以下是純中文顯示的時間與日期：
以下是引用片段：
<SCRIPT LANGUAGE="JavaScript">
<!--
String.prototype.toCHS=function(){return this.replace(/d/g, function(a){return "零一二三四五六七八九".charAt(parseInt(a))}); }
Number.prototype.toCHS=function(){return((this>19?Math.floor(this/10):"")+(this>9?("十"):"")+(this%10= =0&&this>0?"":this%10)).toCHS();}
Date.prototype.toCHS=function(){
with(this)return(getFullYear()+"").toCHS()+"年"+(getMonth()+1).toCHS()+"月"+getDate().toCHS()+"日"+ getHours().toCHS()+"時"+getMinutes().toCHS()+"分"+getSeconds().toCHS()+"秒";
}
alert(new Date().toCHS());
//-->
</SCRIPT>