特别简洁的简单JavaScript日历及说明

以下为详细代码

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
body{ margin:0px; padding:0px; font-size:12px; line-height:22px; font-family:tahoma,"宋体",Simsun, "Microsoft YaHei","Arial Unicode MS", Mingliu, Arial, Helvetica;}
table{ background:#999999; width:600px; margin:0px auto; text-align:center;}
table td{ background:#FFFFFF;}
table th{ background:#CCCCCC; width:84px;}
.calendar{ width:600px; margin:2px auto; height:auto; overflow:hidden; text-align:center;}
.calendar a{text-decoration:none; font-size:14px; display:inline-block; width:30px;}
.calendar a:hover{ background:#BFBFBF;}
.calendar .left{ float:left; width:100px;}
.calendar .now_month{ float:left; width:400px;}
.calendar .right{ float:right; width:100px;}
.red{ color:#FF0000;}
.today{ background:#cccccc;}
.copyright{ width:600px; margin:16px auto;}
</style>
<script type="text/javascript">
/*
power By: http://www.wxwdesign.cn
Author: 流水涵清
*/
//创建calendar类
function calendar(y,m){
  var c=new Date(y,m,1,0,0,0,0);  //当月第一天
  this.daynum=getMonthDays(m+1,y);  //获得当月的天数
  this.firstday=c.getDay();  //当月第一天星期几
}
//获取某一月的天数
function getMonthDays(m,y){
  var d=[31,28,31,30,31,30,31,31,30,31,30,31];
  if(m==2){if(check(y)){return 29;}else{return 28;}}else{return d[m-1];}
  function check(year){
    if(year%100==0){if(year%400==0){return true;}else{return false;}}else{if(year%4==0){return true;}else{return false;}}
  }
}
//获取农历
function GetNL(y,m,d){
var t=new Date(y,m,d,0,0,0,0);
return CnDateofDateStr(t);
}
function DaysNumberofDate(DateGL){return parseInt((Date.parse(DateGL)-Date.parse(DateGL.getFullYear()+"/1/1"))/86400000)+1;}
function CnDateofDate(DateGL){
var CnData=new Array(
0x16,0x2a,0xda,0x00,0x83,0x49,0xb6,0x05,0x0e,0x64,0xbb,0x00,0x19,0xb2,0x5b,0x00,
0x87,0x6a,0x57,0x04,0x12,0x75,0x2b,0x00,0x1d,0xb6,0x95,0x00,0x8a,0xad,0x55,0x02,
0x15,0x55,0xaa,0x00,0x82,0x55,0x6c,0x07,0x0d,0xc9,0x76,0x00,0x17,0x64,0xb7,0x00,
0x86,0xe4,0xae,0x05,0x11,0xea,0x56,0x00,0x1b,0x6d,0x2a,0x00,0x88,0x5a,0xaa,0x04,
0x14,0xad,0x55,0x00,0x81,0xaa,0xd5,0x09,0x0b,0x52,0xea,0x00,0x16,0xa9,0x6d,0x00,
0x84,0xa9,0x5d,0x06,0x0f,0xd4,0xae,0x00,0x1a,0xea,0x4d,0x00,0x87,0xba,0x55,0x04
);
var CnMonth=new Array();
var CnMonthDays=new Array();
var CnBeginDay;
var LeapMonth;
var Bytes=new Array();
var I;
var CnMonthData;
var DaysCount;
var CnDaysCount;
var ResultMonth;
var ResultDay;
var yyyy=DateGL.getFullYear();
var mm=DateGL.getMonth()+1;
var dd=DateGL.getDate();
if(yyyy<100) yyyy+=1900;
  if ((yyyy < 1997) || (yyyy > 2020)){
    return 0;
    }
  Bytes[0] = CnData[(yyyy - 1997) * 4];
  Bytes[1] = CnData[(yyyy - 1997) * 4 + 1];
  Bytes[2] = CnData[(yyyy - 1997) * 4 + 2];
  Bytes[3] = CnData[(yyyy - 1997) * 4 + 3];
  if ((Bytes[0] & 0x80) != 0) {CnMonth[0] = 12;}
  else {CnMonth[0] = 11;}
  CnBeginDay = (Bytes[0] & 0x7f);
  CnMonthData = Bytes[1];
  CnMonthData = CnMonthData << 8;
  CnMonthData = CnMonthData | Bytes[2];
  LeapMonth = Bytes[3];
for (I=15;I>=0;I--){
    CnMonthDays[15 - I] = 29;
    if (((1 << I) & CnMonthData) != 0 ){
      CnMonthDays[15 - I]++;}
    if (CnMonth[15 - I] == LeapMonth ){
      CnMonth[15 - I + 1] = - LeapMonth;}
    else{
      if (CnMonth[15 - I] < 0 ){CnMonth[15 - I + 1] = - CnMonth[15 - I] + 1;}
      else {CnMonth[15 - I + 1] = CnMonth[15 - I] + 1;}
      if (CnMonth[15 - I + 1] > 12 ){ CnMonth[15 - I + 1] = 1;}
    }
  }
  DaysCount = DaysNumberofDate(DateGL) - 1;
  if (DaysCount <= (CnMonthDays[0] - CnBeginDay)){
    if ((yyyy > 1901) && (CnDateofDate(new Date((yyyy - 1)+"/12/31")) < 0)){
      ResultMonth = - CnMonth[0];}
    else {ResultMonth = CnMonth[0];}
    ResultDay = CnBeginDay + DaysCount;
  }
  else{
    CnDaysCount = CnMonthDays[0] - CnBeginDay;
    I = 1;
    while ((CnDaysCount < DaysCount) && (CnDaysCount + CnMonthDays[I] < DaysCount)){
      CnDaysCount+= CnMonthDays[I];
      I++;
    }
    ResultMonth = CnMonth[I];
    ResultDay = DaysCount - CnDaysCount;
  }
  if (ResultMonth > 0){
    return ResultMonth * 100 + ResultDay;}
  else{return ResultMonth * 100 - ResultDay;}
}
function CnMonthofDate(DateGL){
var  CnMonthStr=new Array("零","一","二","三","四","五","六","七","八","九","十","十一","十二");
var  Month;
  Month = parseInt(CnDateofDate(DateGL)/100);
  if (Month < 0){return "闰" + CnMonthStr[-Month] + "月";}
  else{return CnMonthStr[Month] + "月";}
}
function CnDayofDate(DateGL){
var CnDayStr=new Array("零",
    "初一", "初二", "初三", "初四", "初五",
    "初六", "初七", "初八", "初九", "初十",
    "十一", "十二", "十三", "十四", "十五",
    "十六", "十七", "十八", "十九", "二十",
    "廿一", "廿二", "廿三", "廿四", "廿五",
    "廿六", "廿七", "廿八", "廿九", "三十");
var Day;
  Day = (Math.abs(CnDateofDate(DateGL)))%100;
  return CnDayStr[Day];
}
function CnDateofDateStr(DateGL){
  if(CnMonthofDate(DateGL)=="零月"){return "　请调整您的计算机日期!";}else{if((Math.abs(CnDateofDate(DateGL)))%100==1){return "<b>"+CnMonthofDate(DateGL)+"</b>";}else{return CnDayofDate(DateGL);}}
}
//初始化显示
function init_calendar(){
var now=new Date();
var year=now.getFullYear();
var month=now.getMonth();
var day=now.getDay();
var date=now.getDate();
var today=[year,month,date];
var c=document.getElementById("calendar");
var show=document.getElementById("show");
var a=c.getElementsByTagName("a");
var div=c.getElementsByTagName("div");
var ca=new calendar(year,month);
a[1].onclick=function(){month--;if(month<0){year--;month=11;};ca=new calendar(year,month);show_calendar();}
a[2].onclick=function(){month++;if(month>11){year++;month=0;};ca=new calendar(year,month);show_calendar();}
a[0].onclick=function(){year--;ca=new calendar(year,month);show_calendar();}
a[3].onclick=function(){year++;ca=new calendar(year,month);show_calendar();}
function show_calendar(){
   div[1].innerHTML=year+"年"+(month+1)+"月";
   var f="<table border=\"0\" cellspacing=\"1\">";
   f+="<tr><th scope=\"col\" class='red'>日</th><th scope=\"col\">一</th><th scope=\"col\">二</th><th scope=\"col\">三</th><th scope=\"col\">四</th><th scope=\"col\">五</th><th scope=\"col\" class='red'>六</th></tr>";
   f+="<tr>";
   if(ca.firstday>0){for(var i=0;i<ca.firstday;i++){f+="<td></td>";}}
   for(var i=ca.firstday,j=1;j<ca.daynum+1;i++,j++){
     if(i%7==0&&i>0){f+="</tr><tr>";}
     if(today[0]==year&&today[1]==month&&today[2]==j){
	  if(i%7==0||(i+1)%7==0){f+="<td class='red today'>"+j+"<br />"+GetNL(year,month,j)+"</td>";}else{f+="<td class='today' >"+j+"<br />"+GetNL(year,month,j)+"</td>";}
	 }else{
	 if(i%7==0||(i+1)%7==0){f+="<td class='red'>"+j+"<br />"+GetNL(year,month,j)+"</td>";}else{f+="<td>"+j+"<br />"+GetNL(year,month,j)+"</td>";}
	 }
   }
   if(7>(7-(ca.daynum+ca.firstday)%7)>0){for(var i=0;i<(7-(ca.daynum+ca.firstday)%7);i++){f+="<td></td>";}}
   f+="</tr></table>";
   show.innerHTML=f;
}
show_calendar();
}
window.onload=init_calendar;
</script>
<title>javascript_calendar</title>
</head>
<body>
<div class="calendar" id="calendar"><div class="left"><a href="#" title="上一年"><<</a> <a href="#" title="上一月"><</a></div><div class="now_month">2009年7月</div><div class="right"><a href="#" title="下一月">></a> <a href="#" title="下一年">>></a></div></div>
<div class="calendar_show" id="show"></div>
</body>
</html>