新历转农历

lunarCalendar() {     
      var CalendarData=new Array(100);
      var madd=new Array(12);
      var tgString="甲乙丙丁戊己庚辛壬癸";
      var dzString="子丑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腊";
      var weekString="日一二三四五六";
      var sx="鼠牛虎兔龙蛇马羊猴鸡狗猪";
      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+="(闰)";
        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){
      //solarYear = solarYear<1900?(1900+solarYear):solarYear;
      if(solarYear<1921 || solarYear>2020){
      return "";
      }else{
        solarMonth = (parseInt(solarMonth)>0) ? (solarMonth-1) : 11;
        e2c(solarYear,solarMonth,solarDay);
        return GetcDateString();
      }
      }
      
      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;
      return GetLunarDay(yy,mm,dd)
    }