var strBrowser = navigator.appName;
var strVersion = navigator.appVersion.substring(0,4);
strPlatform ="Win"
if ((navigator.appVersion.indexOf("Mac") > -1)){;strPlatform ="Mac";};
var GREG_SDN_OFFSET = 32045, DAYS_PER_5_MONTHS = 153, DAYS_PER_4_YEARS = 1461, DAYS_PER_400_YEARS = 146097;
var HALAKIM_PER_HOUR = 1080, HALAKIM_PER_DAY = 25920, HALAKIM_PER_LUNAR_CYCLE = ((29 * HALAKIM_PER_DAY) + 13753), HALAKIM_PER_METONIC_CYCLE = (HALAKIM_PER_LUNAR_CYCLE * (12 * 19 + 7));
var HEB_SDN_OFFSET = 347997, NEW_MOON_OF_CREATION = 31524, NOON = (18 * HALAKIM_PER_HOUR), AM3_11_20 = ((9 * HALAKIM_PER_HOUR) + 204), AM9_32_43 = ((15 * HALAKIM_PER_HOUR) + 589);
var SUN = 0, MON = 1, TUES = 2, WED = 3, THUR = 4, FRI = 5, SAT = 6;
hebrewMonth = 0, hebrewDate = 0, hebrewYear = 0, metonicCycle = 0, metonicYear = 0, moladDay = 0, moladHalakim = 0;
var gWeekday = new weekdayarr("sun","mon","tues","wednes","thurs","fri","satur");
var gMonth = new gregmontharr("January","February","March","April","May","June","July","August","September","October","November","December");
var hMonth = new hebrewmontharr("Tishri","Heshvan","Kislev","Tevet","Shevat","AdarI","AdarII","Nisan","Iyyar","Sivan","Tammuz","Av","Elul");
var mpy = new monthsperyeararr(12,12,13,12,12,13,12,13,12,12,13,12,12,13,12,12,13,12,13);
var dext = "th";
function weekdayarr(d0,d1,d2,d3,d4,d5,d6) {
	this[0] = d0; this[1] = d1; this[2] = d2; this[3] = d3;
	this[4] = d4; this[5] = d5; this[6] = d6;
}
function gregmontharr(m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,m10,m11) {
	this[0] = m0; this[1] = m1; this[2] = m2; this[3] = m3;
	this[4] = m4; this[5] = m5; this[6] = m6; this[7] = m7;
	this[8] = m8; this[9] = m9; this[10] = m10; this[11] = m11;
}
function hebrewmontharr(m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,m10,m11,m12,m13) {
	this[0] = m0; this[1] = m1; this[2] = m2; this[3] = m3;
	this[4] = m4; this[5] = m5; this[6] = m6; this[7] = m7;
	this[8] = m8; this[9] = m9; this[10] = m10; this[11] = m11;
	this[12] = m12; this[13] = m13;
}
function monthsperyeararr(m0,m1,m2,m3,m4,m5,m6,m7,m8,m9,m10,m11,m12,m13,m14,m15,m16,m17,m18) {
	this[0] = m0; this[1] = m1; this[2] = m2; this[3] = m3;
	this[4] = m4; this[5] = m5; this[6] = m6; this[7] = m7;
	this[8] = m8; this[9] = m9; this[10] = m10; this[11] = m11;
	this[12] = m8; this[13] = m13; this[14] = m14; this[15] = m15;
	this[16] = m16; this[17] = m17; this[18] = m18;
}
function displayWeekday() {
	document.writeln(gWeekday[pass.getDay()] + "day.");
}
function getDateExtension(TheDate) {
	dext = "th";
	if (TheDate == 1 || TheDate == 21 || TheDate == 31) dext="st";
	if (TheDate == 2 || TheDate == 22 || TheDate == 32) dext="nd";
}
function displayGregorianDate() {
	getDateExtension(pass.getDate());
	if ((strBrowser == 'Netscape') && (strVersion > 4.49)) dw=gMonth[pass.getMonth()] + ", " + pass.getDate() + dext + ". " + (pass.getYear()+1900) + ".";
	else dw=gMonth[pass.getMonth()] + ", " + pass.getDate() + dext + ". " + (pass.getYear()+1900-1900) + ".";
	if ((navigator.appName.indexOf("Explorer") > -1)&&(strVersion < 4.0) ) dw=gMonth[pass.getMonth()] + ", " + pass.getDate() + dext + ". " + (pass.getYear()+1900) + ".";
	document.writeln(dw);
}
function displayHebrewDate() {
	getDateExtension(hebrewDate);
	if(hebrewDate != 0 && hebrewMonth != 0 && hebrewYear != 0) document.writeln(hMonth[hebrewMonth-1] + ", " + hebrewDate + dext + ". " + hebrewYear + ".");
}
function GregorianToSdn(inputYear,inputMonth,inputDay) {
	var year = 0, month = 0, sdn;
	/* Make year a positive number. */
	if ((strBrowser == 'Netscape') && (strVersion >4.49)){theoffset=0} else {theoffset=1900}
	if((navigator.appName.indexOf("Explorer")> -1)&&(strVersion < 4.0) ){theoffset=0}
	if (inputYear < 0){year = inputYear + 4801-theoffset;} else {year = inputYear + 4800-theoffset;}
	/* Adjust the start of the year. */
	if (inputMonth > 2) {month = inputMonth - 3;} else {month = inputMonth + 9; year--;}
	sdn = Math.floor((Math.floor(year / 100) * DAYS_PER_400_YEARS) / 4);
	sdn += Math.floor(((year % 100) * DAYS_PER_4_YEARS) / 4);
	sdn += Math.floor((month * DAYS_PER_5_MONTHS + 2) / 5);
	sdn += inputDay - GREG_SDN_OFFSET;
	return sdn;
}
function SdnToHebrew(sdn) {
	var inputDay, tishri1 = 0, tishri1After = 0, yearLength = 0,
	inputDay = sdn - HEB_SDN_OFFSET;
	FindTishriMolad(inputDay);
	tishri1 = Tishri1(metonicYear,moladDay,moladHalakim);
	if (inputDay >= tishri1) {
		/* It found Tishri 1 at the start of the year. */
		hebrewYear = metonicCycle * 19 + metonicYear + 1;
		if (inputDay < tishri1 + 59) {
			if (inputDay < tishri1 + 30) {
				hebrewMonth = 1;
				hebrewDate = inputDay - tishri1 + 1;
			} else {
				hebrewMonth = 2;
				hebrewDate = inputDay - tishri1 - 29;
			}
			return;
		}
		/* We need the length of the year to figure this out, so find Tishri 1 of the next year. */
		moladHalakim += HALAKIM_PER_LUNAR_CYCLE * mpy[metonicYear];
		moladDay += Math.floor(moladHalakim / HALAKIM_PER_DAY);
		moladHalakim = moladHalakim % HALAKIM_PER_DAY;
		tishri1After = Tishri1((metonicYear + 1) % 19,moladDay,moladHalakim);
	} else {
		/* It found Tishri 1 at the end of the year. */
		hebrewYear = metonicCycle * 19 + metonicYear;
		if (inputDay >= tishri1 - 177) {
			/* It is one of the last 6 months of the year. */
			if (inputDay > tishri1 - 30) {
				hebrewMonth = 13;
				hebrewDate = inputDay - tishri1 + 30;
			} else if (inputDay > tishri1 - 60) {
					hebrewMonth = 12;
					hebrewDate = inputDay - tishri1 + 60;
				} else if (inputDay > tishri1 - 89) {
						hebrewMonth = 11;
						hebrewDate = inputDay - tishri1 + 89;
					} else if (inputDay > tishri1 - 119) {
							hebrewMonth = 10;
							hebrewDate = inputDay - tishri1 + 119;
						} else if (inputDay > tishri1 - 148) {
								hebrewMonth = 9;
								hebrewDate = inputDay - tishri1 + 148;
							} else {
								hebrewMonth = 8;
								hebrewDate = inputDay - tishri1 + 178;
							}
			return;
		} else {
			if (mpy[(hebrewYear - 1) % 19] == 13) {
				hebrewMonth = 7;
				hebrewDate = inputDay - tishri1 + 207;
				if (hebrewDate > 0) return;
				hebrewMonth--;
				hebrewDate += 30;
				if (hebrewDate > 0) return;
				hebrewMonth--;
				hebrewDate += 30;
			} else {
				hebrewMonth = 6;
				hebrewDate = inputDay - tishri1 + 207;
				if (hebrewDate > 0) return;
				hebrewMonth--;
				hebrewDate += 30;
			}
			if (hebrewDate > 0) return;
			hebrewMonth--;
			hebrewDate += 29;
			if (hebrewDate > 0) return;
			/* We need the length of the year to figure this out, so find Tishri 1 of this year. */
			tishri1After = tishri1;
			FindTishriMolad(moladDay - 365);
			tishri1 = Tishri1(metonicYear,moladDay,moladHalakim);
		}
	}
	yearLength = tishri1After - tishri1;
	moladDay = inputDay - tishri1 - 29;
	if (yearLength == 355 || yearLength == 385) {
		/* Heshvan has 30 days. */
		if (moladDay <= 30) {
			hebrewMonth = 2;
			hebrewDate = moladDay;
			return;
		}
		moladDay -= 30;
	} else {
		/* Heshvan has 29 days. */
		if (moladDay <= 29) {
			hebrewMonth = 2;
			hebrewDate = moladDay;
			return;
		}
		moladDay -= 29;
	}
	/* It has to be Kislev. */
	hebrewMonth = 3;
	hebrewDate = moladDay;
}
function FindTishriMolad(inputDay) {
	/* Estimate the metonic cycle number. */
	/* Note that this may be an under estimate because there are 6939.6896 days in a metonic cycle not 6940, but it will never be an over estimate. */
	/* The loop below will correct for any error in this estimate. */
	metonicCycle = Math.floor((inputDay + 310) / 6940);
	/* Calculate the time of the starting molad for this metonic cycle. */
	MoladOfMetonicCycle();
	/* If the above was an under estimate, increment the cycle number until the correct one is found. */
	/* For modern dates this loop is about 98.6% likely to not execute, even once, because the above estimate is really quite close. */
	while (moladDay < inputDay - 6940 + 310) {
		metonicCycle++;
		moladHalakim += HALAKIM_PER_METONIC_CYCLE;
		moladDay += Math.floor(moladHalakim / HALAKIM_PER_DAY);
		moladHalakim = moladHalakim % HALAKIM_PER_DAY;
	}
	/* Find the molad of Tishri closest to this date. */
	for (metonicYear = 0; metonicYear < 18; metonicYear++) {
		if (moladDay > inputDay - 74) break;
		moladHalakim += HALAKIM_PER_LUNAR_CYCLE * mpy[metonicYear];
		moladDay += Math.floor(moladHalakim / HALAKIM_PER_DAY);
		moladHalakim = moladHalakim % HALAKIM_PER_DAY;
	}
}
function MoladOfMetonicCycle() {
	var r1,r2,d1,d2;
	/* Start with the time of the first molad after creation. */
	r1 = NEW_MOON_OF_CREATION;
	/* Calculate gMetonicCycle * HALAKIM_PER_METONIC_CYCLE. */
	/*  The upper 32 bits of the result will be in r2 and the lower 16 bits will be in r1. */
	r1 += metonicCycle * (HALAKIM_PER_METONIC_CYCLE&0xFFFF);
	r2 = r1 >> 16;
	r2 += metonicCycle * ((HALAKIM_PER_METONIC_CYCLE >> 16)&0xFFFF);
	/* Calculate r2r1 / HALAKIM_PER_DAY. */
	/* The remainder will be in r1, the upper 16 bits of the quotient will be in d2 and the lower 16 bits will be in d1. */
	d2 = Math.floor(r2 / HALAKIM_PER_DAY);
	r2 -= d2 * HALAKIM_PER_DAY;
	r1 = (r2 << 16) | (r1&0xFFFF);
	d1 = Math.floor(r1 / HALAKIM_PER_DAY);
	r1 -= d1 * HALAKIM_PER_DAY;
	moladDay = (d2 << 16) | d1;
	moladHalakim = r1;
}
function Tishri1(metonicYear,moladDay,moladHalakim) {
	var tishri1 = moladDay;
	var dow = tishri1 % 7;
	var leapYear =  metonicYear == 2 || metonicYear == 5 || metonicYear == 7 || metonicYear == 10 || metonicYear == 13 || metonicYear == 16 || metonicYear == 18;
	var lastWasLeapYear =   metonicYear == 3 || metonicYear == 6 || metonicYear == 8 || metonicYear == 11 || metonicYear == 14 || metonicYear == 17 || metonicYear == 0;
	/* Apply rules 2, 3 and 4. */
	if ((moladHalakim >= NOON) || ((!leapYear) && dow == TUES && moladHalakim >= AM3_11_20) || (lastWasLeapYear && dow == MON && moladHalakim >= AM9_32_43)) {
		tishri1++;
		dow++;
		if (dow == 7) dow = 0;
	}
	/* Apply rule 1 after the others because it can cause an additional delay of one day. */
	if (dow == WED || dow == FRI || dow == SUN) tishri1++;
	return tishri1;
}