一个農歷 Javascript 代码

// JavaScript Document
function CalConv()
{
FIRSTYEAR = 1998;
LASTYEAR = 2031;

today = new Date();
SolarYear = today.getFullYear();
SolarMonth = today.getMonth() + 1;
SolarDate = today.getDate();
Weekday = today.getDay();
LunarCal = [
new tagLunarCal( 27,  5, 3, 43, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1 ),
new tagLunarCal( 46,  0, 4, 48, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 ), /* 88 */
new tagLunarCal( 35,  0, 5, 53, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 ), /* 89 */
new tagLunarCal( 23,  4, 0, 59, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 ),
new tagLunarCal( 42,  0, 1,  4, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 ),
new tagLunarCal( 31,  0, 2,  9, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0 ),
new tagLunarCal( 21,  2, 3, 14, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1 ), /* 93 */
new tagLunarCal( 39,  0, 5, 20, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1 ),
new tagLunarCal( 28,  7, 6, 25, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1 ),
new tagLunarCal( 48,  0, 0, 30, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1 ),
new tagLunarCal( 37,  0, 1, 35, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1 ), /* 97 */
new tagLunarCal( 25,  5, 3, 41, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 ),
new tagLunarCal( 44,  0, 4, 46, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 ),
new tagLunarCal( 33,  0, 5, 51, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 ),
new tagLunarCal( 22,  4, 6, 56, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 ), /* 101 */
new tagLunarCal( 40,  0, 1,  2, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 ),
new tagLunarCal( 30,  9, 2,  7, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 ),
new tagLunarCal( 49,  0, 3, 12, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1 ),
new tagLunarCal( 38,  0, 4, 17, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0 ), /* 105 */
new tagLunarCal( 27,  6, 6, 23, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1 ),
new tagLunarCal( 46,  0, 0, 28, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0 ),
new tagLunarCal( 35,  0, 1, 33, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 ),
new tagLunarCal( 24,  4, 2, 38, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 ), /* 109 */
new tagLunarCal( 42,  0, 4, 44, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 ),
new tagLunarCal( 31,  0, 5, 49, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0 ),
new tagLunarCal( 21,  2, 6, 54, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 ),
new tagLunarCal( 40,  0, 0, 59, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1 ), /* 113 */
new tagLunarCal( 28,  6, 2,  5, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0 ),
new tagLunarCal( 47,  0, 3, 10, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1 ),
new tagLunarCal( 36,  0, 4, 15, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 ),
new tagLunarCal( 25,  5, 5, 20, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 ), /* 117 */
new tagLunarCal( 43,  0, 0, 26, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1 ),
new tagLunarCal( 32,  0, 1, 31, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0 ),
new tagLunarCal( 22,  3, 2, 36, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0 ) ];
/* 农歴年每月之日數 */
SolarCal = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];

/* 农歴年每月之累積日數, 平年與閏年 */
SolarDays = [  0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365, 396,  0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366, 397 ];
AnimalIdx = ["马", "羊", "猴", "鸡", "狗", "猪", "鼠", "牛", "虎", "兔", "龙", "蛇" ];
LocationIdx = [ "南", "东", "北", "西" ];
if ( SolarYear <= FIRSTYEAR || SolarYear > LASTYEAR ) return 1;
sm = SolarMonth - 1;
if ( sm < 0 || sm > 11 ) return 2;
leap = GetLeap( SolarYear );
if ( sm == 1 )
d = leap + 28;
else
d = SolarCal[sm];
if ( SolarDate < 1 || SolarDate > d ) return 3;
y = SolarYear - FIRSTYEAR;
acc = SolarDays[ leap*14 + sm ] + SolarDate;
kc = acc + LunarCal[y].BaseKanChih;
Kan = kc % 10;
Chih = kc % 12;
Location = LocationIdx[kc % 4];
Age = kc % 60;
if ( Age < 22 )
Age = 22 - Age;
else
Age = 82 - Age;
Animal = AnimalIdx[ Chih ];
if ( acc <= LunarCal[y].BaseDays ) {
y--;
LunarYear = SolarYear - 1;
leap = GetLeap( LunarYear );
sm += 12;
acc = SolarDays[leap*14 + sm] + SolarDate;
}
else
LunarYear = SolarYear;
l1 = LunarCal[y].BaseDays;
for ( i=0; i<13; i++ ) {
l2 = l1 + LunarCal[y].MonthDays[i] + 29;
if ( acc <= l2 ) break;
l1 = l2;
}

LunarMonth = i + 1;
LunarDate = acc - l1;
im = LunarCal[y].Intercalation;
if ( im != 0 && LunarMonth > im ) {
LunarMonth--;
if ( LunarMonth == im ) LunarMonth = -im;
}

if ( LunarMonth > 12 ) LunarMonth -= 12;
today=new Date();

function initArray(){
this.length=initArray.arguments.length
for(var i=0;ithis[i+1]=initArray.arguments[i]  }
var d=new initArray("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
//document.write(" ", today.getYear(),"年",today.getMonth()+1,"月",today.getDate(),"日",d[today.getDay()+1],"");
var mm=LunarMonth;
var dd=LunarDate;
if (mm==1)
mm="正"
else
mm=NumerToChinese(mm);        
if (dd<11)
dd="初"+NumerToChinese(dd);
else
{
if (dd<20)
dd="十"+NumerToChinese(dd-10);
else
{
if (dd<30)
    dd="二十"+NumerToChinese(dd-20);
else
    dd="三十"+NumerToChinese(dd-30);
}
}
document.write("农历"+mm+"月"+dd);
return 0;
}

/*数字转汉字*/
function NumerToChinese(num)
{
var ret="";
if (num==0) ret="";
if (num==1) ret="一";
if (num==2) ret="二";
if (num==3) ret="三";
if (num==4) ret="四";
if (num==5) ret="五";
if (num==6) ret="六";
if (num==7) ret="七";
if (num==8) ret="八";
if (num==9) ret="九";
if (num==10) ret="十";
if (num==11) ret="十一";
if (num==12) ret="腊";
return ret;
}

/* 求此农歴年是否為閏年, 返回 0 為平年, 1 為閏年 */
function GetLeap( year )
{
if ( year % 400 == 0 )
return 1;
else if ( year % 100 == 0 )
return 0;
else if ( year % 4 == 0 )
return 1;
else
return 0;
}

function tagLunarCal( d, i, w, k, m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11, m12, m13) {
this.BaseDays = d;         /* 到农歴 1 月 1 日到農曆正月初一的累積日數 */
this.Intercalation = i;    /* 閏月月份. 0==此年沒有閏月 */
this.BaseWeekday = w;      /* 此年农歴 1 月 1 日為星期幾再減 1 */
this.BaseKanChih = k;      /* 此年农歴 1 月 1 日之干支序號減 1 */
this.MonthDays = [ m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11, m12, m13 ]; /* 此農曆年每月之大小, 0==小月(29日), 1==大月(30日) */
}