js版公历转农历

var lunarInfo=new Array(

0x4bd8,0x4ae0,0xa570,0x54d5,0xd260,0xd950,0x5554,0x56af,0x9ad0,0x55d2,

0x4ae0,0xa5b6,0xa4d0,0xd250,0xd255,0xb54f,0xd6a0,0xada2,0x95b0,0x4977,

0x497f,0xa4b0,0xb4b5,0x6a50,0x6d40,0xab54,0x2b6f,0x9570,0x52f2,0x4970,

0x6566,0xd4a0,0xea50,0x6a95,0x5adf,0x2b60,0x86e3,0x92ef,0xc8d7,0xc95f,

0xd4a0,0xd8a6,0xb55f,0x56a0,0xa5b4,0x25df,0x92d0,0xd2b2,0xa950,0xb557,

0x6ca0,0xb550,0x5355,0x4daf,0xa5b0,0x4573,0x52bf,0xa9a8,0xe950,0x6aa0,

0xaea6,0xab50,0x4b60,0xaae4,0xa570,0x5260,0xf263,0xd950,0x5b57,0x56a0,

0x96d0,0x4dd5,0x4ad0,0xa4d0,0xd4d4,0xd250,0xd558,0xb540,0xb6a0,0x95a6,

0x95bf,0x49b0,0xa974,0xa4b0,0xb27a,0x6a50,0x6d40,0xaf46,0xab60,0x9570,

0x4af5,0x4970,0x64b0,0x74a3,0xea50,0x6b58,0x5ac0,0xab60,0x96d5,0x92e0,

0xc960,0xd954,0xd4a0,0xda50,0x7552,0x56a0,0xabb7,0x25d0,0x92d0,0xcab5,

0xa950,0xb4a0,0xbaa4,0xad50,0x55d9,0x4ba0,0xa5b0,0x5176,0x52bf,0xa930,

0x7954,0x6aa0,0xad50,0x5b52,0x4b60,0xa6e6,0xa4e0,0xd260,0xea65,0xd530,

0x5aa0,0x76a3,0x96d0,0x4afb,0x4ad0,0xa4d0,0xd0b6,0xd25f,0xd520,0xdd45,

0xb5a0,0x56d0,0x55b2,0x49b0,0xa577,0xa4b0,0xaa50,0xb255,0x6d2f,0xada0,

0x4b63,0x937f,0x49f8,0x4970,0x64b0,0x68a6,0xea5f,0x6b20,0xa6c4,0xaaef,

0x92e0,0xd2e3,0xc960,0xd557,0xd4a0,0xda50,0x5d55,0x56a0,0xa6d0,0x55d4,

0x52d0,0xa9b8,0xa950,0xb4a0,0xb6a6,0xad50,0x55a0,0xaba4,0xa5b0,0x52b0,

0xb273,0x6930,0x7337,0x6aa0,0xad50,0x4b55,0x4b6f,0xa570,0x54e4,0xd260,

0xe968,0xd520,0xdaa0,0x6aa6,0x56df,0x4ae0,0xa9d4,0xa4d0,0xd150,0xf252,

0xd520);

function leapMonth(y) {

 var lm = lunarInfo[y-1900] & 0xf;

 return(lm==0xf?0:lm);

}

function monthDays(y,m) {

 return( (lunarInfo[y-1900] & (0x10000>>m))? 30: 29 );

}

function leapDays(y) {

 if(leapMonth(y)) return( (lunarInfo[y-1899]&0xf)==0xf? 30: 29);

 else return(0);

}

//return days of lunar year

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));

}

//calcute lunar date  .year .month .day .isLeap

function Lunar(objDate) {

   var i, leap=0, temp=0;

   var offset   = (Date.UTC(objDate.getFullYear(),objDate.getMonth(),objDate.getDate()) - Date.UTC(1900,0,31))/86400000;

   for(i=1900; i<2100 && offset>0; i++) { temp=lYearDays(i); offset-=temp; }

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

   this.year = i;

   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(offset==0 && leap>0 && i==leap+1)

      if(this.isLeap)

         { this.isLeap = false; }

      else

         { this.isLeap = true; --i; }

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

   this.month = i;

   this.day = offset + 1;

}

var lDate = new Lunar(new Date());

var y = lDate.year;

var m = lDate.month;

var d = lDate.day;

alert(y+"-"+m+"-"+d);