JavaScript写的中国农历

 <!--  中国农历开始  -->
<SCRIPT language=JavaScript><!--
var lunarInfo=new Array(
0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,
0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,
0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,
0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,
0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,
0x06ca0,0x0b550,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,
0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,
0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,
0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,
0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,
0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,
0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,
0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,
0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,
0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0)
var Animals=new Array("鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪");
var Gan=new Array("甲","乙","丙","丁","戊","己","庚","辛","壬","癸");
var Zhi=new Array("子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥");
var now = new Date();
var SY = now.getYear();
var SM = now.getMonth();
var SD = now.getDate();
 
//==== 传入 offset 传回干支, 0=甲子
function cyclical(num) { return(Gan[num%10]+Zhi[num%12])}

//==== 传回农历 y年的总天数
function lYearDays(y) {
   var i, sum = 348
   for(i=0x8000; i>0x8; i>>=1) sum += (lunarInfo[y-1900] & i)? 1: 0
   return(sum+leapDays(y))
}

//==== 传回农历 y年闰月的天数
function leapDays(y) {
   if(leapMonth(y))  return((lunarInfo[y-1900] & 0x10000)? 30: 29)
   else return(0)
}

//==== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
function leapMonth(y) { return(lunarInfo[y-1900] & 0xf)}

//====================================== 传回农历 y年m月的总天数
function monthDays(y,m) { return( (lunarInfo[y-1900] & (0x10000>>m))? 30: 29 )}

//==== 算出农历, 传入日期物件, 传回农历日期物件
//     该物件属性有 .year .month .day .isLeap .yearCyl .dayCyl .monCyl
function Lunar(objDate) {
   var i, leap=0, temp=0
   var baseDate = new Date(1900,0,31)
   var offset   = (objDate - baseDate)/86400000

   this.dayCyl = offset + 40
   this.monCyl = 14

   for(i=1900; i<2050 && offset>0; i++) {
      temp = lYearDays(i)
      offset -= temp
      this.monCyl += 12
   }
   if(offset<0) {
      offset += temp;
      i--;
      this.monCyl -= 12
   }

   this.year = i
   this.yearCyl = i-1864

   leap = leapMonth(i) //闰哪个月
   this.isLeap = false

   for(i=1; i<13 && offset>0; i++) {
      //闰月
      if(leap>0 && i==(leap+1) && this.isLeap==false)
         { --i; this.isLeap = true; temp = leapDays(this.year); }
      else
         { temp = monthDays(this.year, i); }

      //解除闰月
      if(this.isLeap==true && i==(leap+1)) this.isLeap = false

      offset -= temp
      if(this.isLeap == false) this.monCyl ++
   }

   if(offset==0 && leap>0 && i==leap+1)
      if(this.isLeap)
         { this.isLeap = false; }
      else
         { this.isLeap = true; --i; --this.monCyl;}

   if(offset<0){ offset += temp; --i; --this.monCyl; }

   this.month = i
   this.day = offset + 1
}

 function YYMMDD(){
    var cl = '<font color="#0000df" STYLE="font-size:9pt;">';
    if (now.getDay() == 0) cl = '<font color="#c00000" STYLE="font-size:9pt;">';
    if (now.getDay() == 6) cl = '<font color="#00c000" STYLE="font-size:9pt;">';
    return(cl+SY+'年'+(SM+1)+'月'+SD+'日</font>');
 }
 function weekday(){
    var day = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
    var cl = '<font color="#ff0000" STYLE="font-size:9pt;">';
    if (now.getDay() == 0) cl = '<font color="#c00000" STYLE="font-size:9pt;">';
    if (now.getDay() == 6) cl = '<font color="#00c000" STYLE="font-size:9pt;">';
    return(cl+ day[now.getDay()]+ '</font>');
 }
//==== 中文日期
function cDay(m,d){
 var nStr1 = new Array('日','一','二','三','四','五','六','七','八','九','十');
 var nStr2 = new Array('初','十','廿','卅','　');
 var s;
 if (m>10){s = '十'+nStr1[m-10]} else {s = nStr1[m]} s += '月'
 switch (d) {
  case 10:s += '初十'; break;
  case 20:s += '二十'; break;
  case 30:s += '三十'; break;
  default:s += nStr2[Math.floor(d/10)]; s += nStr1[d%10];
 }
 return(s);
}
 function solarDay1(){
    var sDObj = new Date(SY,SM,SD);
    var lDObj = new Lunar(sDObj);
    var cl = '<font color="violet" STYLE="font-size:9pt;">';
    var tt = '【'+Animals[(SY-4)%12]+'】'+cyclical(lDObj.monCyl)+'月 '+cyclical(lDObj.dayCyl++)+'日' ;
    return(cl+tt+'</font>');
 }
 function solarDay2(){
    var sDObj = new Date(SY,SM,SD);
    var lDObj = new Lunar(sDObj);
    var cl = '<font color="#000066" STYLE="font-size:9pt;">';
    //农历BB'+(cld[d].isLeap?'闰 ':' ')+cld[d].lMonth+' 月 '+cld[d].lDay+' 日
    var tt = cyclical(SY-1900+36)+'年 '+cDay(lDObj.month,lDObj.day);
    return(cl+tt+'</font>');
 }
 function solarDay3(){
var sTermInfo = new Array(0,21208,42467,63836,85337,107014,128867,150921,173149,195551,218072,240693,263343,285989,308563,331033,353350,375494,397447,419210,440795,462224,483532,504758)
var solarTerm = new Array("小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至")
var lFtv = new Array("0101*春节","0115 元宵节","0505 端午节","0707 七夕情人节","0715 中元节","0815 中秋节","0909 重阳节","1208 腊八节","1224 小年","0100*除夕")
var sFtv = new Array("0101*元旦","0214 情人节","0308 妇女节","0309 偶今天又长一岁拉","0312 植树节","0315 消费者权益日","0401 愚人节","0418 MM的生日","0501 劳动节","0504 青年节","0512 护士节","0601 儿童节","0701 建党节 香港回归纪念",
"0801 建军节","0808 父亲节","0909 毛泽东逝世纪念","0910 教师节","0928 孔子诞辰","1001*国庆节",
"1006 老人节","1024 联合国日","1112 孙中山诞辰","1220 澳门回归纪念","1225 圣诞节","1226 毛泽东诞辰")

  var sDObj = new Date(SY,SM,SD);
  var lDObj = new Lunar(sDObj);
  var lDPOS = new Array(3)
  var festival='',solarTerms='',solarFestival='',lunarFestival='',tmp1,tmp2;
  //农历节日
  for(i in lFtv)
  if(lFtv[i].match(/^(\d{2})(.{2})([\s\*])(.+)$/)) {
   tmp1=Number(RegExp.$1)-lDObj.month
   tmp2=Number(RegExp.$2)-lDObj.day
   if(tmp1==0 && tmp2==0) lunarFestival=RegExp.$4
  }
  //国历节日
  for(i in sFtv)
  if(sFtv[i].match(/^(\d{2})(\d{2})([\s\*])(.+)$/)){
   tmp1=Number(RegExp.$1)-(SM+1)
   tmp2=Number(RegExp.$2)-SD
   if(tmp1==0 && tmp2==0) solarFestival = RegExp.$4
  }
  //节气
  tmp1 = new Date((31556925974.7*(SY-1900)+sTermInfo[SM*2+1]*60000)+Date.UTC(1900,0,6,2,5))
  tmp2 = tmp1.getUTCDate()
  if (tmp2==SD) solarTerms = solarTerm[SM*2+1] 
  tmp1 = new Date((31556925974.7*(SY-1900)+sTermInfo[SM*2]*60000)+Date.UTC(1900,0,6,2,5))
  tmp2= tmp1.getUTCDate()
  if (tmp2==SD) solarTerms = solarTerm[SM*2]

  if(solarTerms == '' && solarFestival == '' && lunarFestival == '')
    festival = '';
  else
    festival = '<TABLE WIDTH=100% BORDER=0 CELLPADDING=2 CELLSPACING=0 BGCOLOR="#CCFFCC"><TR><TD>'+
    '<FONT COLOR="#000000" STYLE="font-size:9pt;">'+solarTerms + ' ' + solarFestival + ' ' + lunarFestival+'</FONT></TD>'+
    '</TR></TABLE>';
        
  var cl = '<font color="#000066" STYLE="font-size:9pt;">';
  return(cl+festival+'</font>');
 }
 function setCalendar(){
    document.write('<table align=center CELLPADDING=2 CELLSPACING=0 border=1><tr><td bgcolor=#FEFEEF><table border=0 CELLPADDING=0 CELLSPACING=0><tr><td align=center>');
    document.write(YYMMDD()+'&nbsp;&nbsp;'+weekday());
    document.write('</td></tr>');
    document.write('<tr><td align=center>');
    document.write(solarDay1());
    document.write('</td></tr><tr><td align=center>');
    document.write(solarDay2());
    document.write('</td></tr><tr><td>');
    document.write(solarDay3());
    document.write('</td></tr></table></td></tr></table>');
 }

 setCalendar();
//--></SCRIPT>
<!--  中国农历结束  -->
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