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;

function init()
{
	CalendarData = new Array(0xA4B,0x5164B,0x6A5,0x6D4,0x415B5,0x2B6,0x957,0x2092F,0x497,0x60C96,    // 1921-1930
	0xD4A,0xEA5,0x50DA9,0x5AD,0x2B6,0x3126E, 0x92E,0x7192D,0xC95,0xD4A,     // 1931-1940
	0x61B4A,0xB55,0x56A,0x4155B, 0x25D,0x92D,0x2192B,0xA95,0x71695,0x6CA,   // 1941-1950
	0xB55,0x50AB5,0x4DA,0xA5B,0x30A57,0x52B,0x8152A,0xE95,0x6AA,0x615AA,    // 1951-1960
	0xAB5,0x4B6,0x414AE,0xA57,0x526,0x31D26,0xD95,0x70B55,0x56A,0x96D,      // 1961-1970
	0x5095D,0x4AD,0xA4D,0x41A4D,0xD25,0x81AA5, 0xB54,0xB6A,0x612DA,0x95B,   // 1971-1980
	0x49B,0x41497,0xA4B,0xA164B, 0x6A5,0x6D4,0x615B4,0xAB6,0x957,0x5092F,   // 1981-1990
	0x497,0x64B, 0x30D4A,0xEA5,0x80D65,0x5AC,0xAB6,0x5126D,0x92E,0xC96,     // 1991-2000
	0x41A95,0xD4A,0xDA5,0x20B55,0x56A,0x7155B,0x25D,0x92D,0x5192B,0xA95,    // 2001-2010
	0xB4A,0x416AA,0xAD5,0x90AB5,0x4BA,0xA5B, 0x60A57,0x52B,0xA93,0x40E95);	// 2011-2020

	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);	//年干
	tmp+=dzString.charAt((cYear-4)%12);	//年支
	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"));
	/*卅*/
	if (cDay%10!=0||cDay==10)
	{
		tmp+=numString.charAt((cDay-1)%10);
	}
	return tmp;
}

init();

function GetLunarDay(solarYear,solarMonth,solarDay)
{
	if (solarYear<1921 || solarYear>2020)
	{
		return "";	//年份不在1921-2020范围，无法获得。
	}
	else
	{
		solarMonth = (parseInt(solarMonth)>0) ? (solarMonth-1) : 11;
		e2c(solarYear,solarMonth,solarDay);
		return GetcDateString();
	}
}