js實現的輸出當前農曆日期

有些比較中國傳統化的網站，可能日期會使用農曆形式展現，可能這樣的需求較少，但是並非沒有，下面就分享一段能夠實現這樣功能的程式碼例項，需喲的可以直接引用，當然也可以根據自己的需要進行修改。

程式碼例項如下:

[JavaScript] 純文字檢視 複製程式碼
var CalendarData = new Array(100);
var madd = new Array(12);
var tgString = "甲乙丙丁戊己庚辛壬癸";
var dzString = "子醜寅卯辰巳午未申酉戌亥";
var numString = "一二三四五六七八九十";
var monString = "正二三四五六七八九十冬臘";
var weekString = "日一二三四五六";
var sx = "鼠牛虎兔龍蛇馬羊猴雞狗豬";
var cYear, cMonth, cDay, TheDate;
CalendarData = new Array(0xA4B, 0x5164B, 0x6A5, 0x6D4, 0x415B5, 0x2B6, 0x957, 0x2092F, 0x497, 0x60C96, 0xD4A, 0xEA5, 0x50DA9, 0x5AD, 0x2B6, 0x3126E, 0x92E, 0x7192D, 0xC95, 0xD4A, 0x61B4A, 0xB55, 0x56A, 0x4155B, 0x25D, 0x92D, 0x2192B, 0xA95, 0x71695, 0x6CA, 0xB55, 0x50AB5, 0x4DA, 0xA5B, 0x30A57, 0x52B, 0x8152A, 0xE95, 0x6AA, 0x615AA, 0xAB5, 0x4B6, 0x414AE, 0xA57, 0x526, 0x31D26, 0xD95, 0x70B55, 0x56A, 0x96D, 0x5095D, 0x4AD, 0xA4D, 0x41A4D, 0xD25, 0x81AA5, 0xB54, 0xB6A, 0x612DA, 0x95B, 0x49B, 0x41497, 0xA4B, 0xA164B, 0x6A5, 0x6D4, 0x615B4, 0xAB6, 0x957, 0x5092F, 0x497, 0x64B, 0x30D4A, 0xEA5, 0x80D65, 0x5AC, 0xAB6, 0x5126D, 0x92E, 0xC96, 0x41A95, 0xD4A, 0xDA5, 0x20B55, 0x56A, 0x7155B, 0x25D, 0x92D, 0x5192B, 0xA95, 0xB4A, 0x416AA, 0xAD5, 0x90AB5, 0x4BA, 0xA5B, 0x60A57, 0x52B, 0xA93, 0x40E95);
madd[0] = 0;
madd[1] = 31;
madd[2] = 59;
madd[3] = 90;
madd[4] = 120;
madd[5] = 151;
madd[6] = 181;
madd[7] = 212;
madd[8] = 243;
madd[9] = 273;
madd[10] = 304;
madd[11] = 334;
function GetBit(m, n){return (m >> n) & 1;}
function e2c() 
{
  TheDate=(arguments.length != 3) ? new Date() : new Date(arguments[0], arguments[1], arguments[2]);
  var total, m, n, k;
  var isEnd = false;
  var tmp = TheDate.getYear();
  if (tmp < 1900){tmp += 1900;}
  total = (tmp - 1921) * 365 + Math.floor((tmp - 1921) / 4) + madd[TheDate.getMonth()] + TheDate.getDate() - 38;
  if (TheDate.getYear() % 4 == 0 && TheDate.getMonth() > 1){total++;}
  for (m = 0; ; m++) 
  {
    k = (CalendarData[m] < 0xfff) ? 11 : 12;
    for (n = k; n >= 0; n--) 
    {
      if (total <= 29 + GetBit(CalendarData[m], n)) {isEnd = true; break; }
      total = total - 29 - GetBit(CalendarData[m], n);
    }
    if (isEnd) break;
  }
  cYear = 1921 + m;
  cMonth = k - n + 1;
  cDay = total;
  if (k == 12) 
  {
    if (cMonth == Math.floor(CalendarData[m] / 0x10000) + 1) {cMonth = 1 - cMonth;}
    if (cMonth > Math.floor(CalendarData[m] / 0x10000) + 1) {cMonth--;}
  }
}
function GetcDateString() 
{
  var tmp = "";
  tmp += tgString.charAt((cYear - 4) % 10);
  tmp += dzString.charAt((cYear - 4) % 12);
  tmp += "(";
  tmp += sx.charAt((cYear - 4) % 12);
  tmp += ")年 ";
  if (cMonth < 1) 
  {
    tmp += "(閏)";
    tmp += monString.charAt(-cMonth - 1);
  }
  else
  {
    tmp += monString.charAt(cMonth - 1);
  }
  tmp += "月";
  tmp += (cDay < 11) ? "初" : ((cDay < 20) ? "十" : ((cDay < 30) ? "廿" : "三十"));
  if (cDay % 10 != 0 || cDay == 10) 
  {
    tmp += numString.charAt((cDay - 1) % 10);
  }
  return tmp;
}
function GetLunarDay(solarYear, solarMonth, solarDay) 
{
  if (solarYear < 1921 || solarYear > 2020) 
  {
    return "";
  } 
  else
  {
    solarMonth = (parseInt(solarMonth) > 0) ? (solarMonth - 1) : 11;
    e2c(solarYear, solarMonth, solarDay);
    return GetcDateString();
  }
}
//呼叫
var D = new Date();
var yy = D.getFullYear();
var mm = D.getMonth() + 1;
var dd = D.getDate();
var ww = D.getDay();
var ss = parseInt(D.getTime() / 1000);
if (yy < 100) yy = "19" + yy;
function GetCNDate() 
{
  return GetLunarDay(yy, mm, dd);
}
window.onload=function()
{
  var d = GetCNDate();
  alert(d);
}