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 ), /* 1999 */
			new tagLunarCal( 35,  0, 5, 53, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 ), /* 2000 */
			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 ), /* 2004 */
			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 ), /* 2008 */
			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 ), /* 2012 */
			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 ), /* 2016 */
			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 ), /* 2020 */
			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 ), /* 2024 */
			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 ), /* 2028 */
			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 ) ];


		/* 西曆年每月之日數 */
		SolarCal = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];

		/* 西曆年每月之累積日數, 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 = ["馬 ", "羊 ", "猴 ", "雞 ", "狗 ", "豬 ", "鼠 ", "牛 ", "虎 ", "兔 ", "龍 ", "蛇 " ];
		LocationIdx = [ "南", "東", "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;

		Age =Age + 3;

		if (Age < 10)
			Age=Age+60;

		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;
		
		var strDate = "";
		
		strDate = strDate.concat("西元 ").concat(SolarYear).concat("年").concat(SolarMonth).concat("月").concat(SolarDate).concat("日 - ");
		strDate = strDate.concat("農曆 ").concat(getGanzhi(LunarYear)).concat("年 ").concat(LunarMonth).concat("月 ").concat(LunarDate).concat("日 - ");
		strDate = strDate.concat("煞").concat(Location).concat(" - 沖").concat(Animal).concat(Age).concat(" 歲");
		
		document.getElementById('showDate').innerHTML = strDate;
						
		return 0;
	}

	/* 求此西曆年是否為閏年, 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;         /* 到西曆 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;      /* 此年西曆 1 月 1 日為星期幾再減 1 */
		this.BaseKanChih = k;      /* 此年西曆 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) */
	}

	function getGanzhi(varYear){
		varYear -= 1912;
		
		var aryGan = ["壬","癸","甲","乙","丙","丁","戊","己","庚","辛"]
		var aryZhi = ["子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"]
		
		return(aryGan[varYear % 10] + aryZhi[varYear % 12]);
	}