function setLatLong(f, index)
	{
		f["latDeg"].value = City[index].lat;
		f["lonDeg"].value = City[index].lng;
		f["latMin"].value = 0;
		f["latSec"].value = 0;
		f["lonMin"].value = 0;
		f["lonSec"].value = 0;
		convLatLong(f);
		f["hrsToGMT"].value =  City[index].zoneHr;
	}
	function isLeapYear(yr) 
	{
		return ((yr % 4 == 0 && yr % 100 != 0) || yr % 400 == 0);
	}
	function isPosInteger(inputVal) 
	{
		inputStr = ("" + inputVal);
		for (var i = 0; i < inputStr.length; i++) {
			var oneChar = inputStr.charAt(i);
			if (oneChar < "0" || oneChar > "9")
				return false;
		}
		return true;
	}
	function isInteger(inputVal) 
	{
		inputStr = "" + inputVal;
		if(inputStr == "NaN") return false;
		if(inputStr == "-NaN") return false;
		for (var i = 0; i < inputStr.length; i++) 
		{
			var oneChar = inputStr.charAt(i);
			if (i == 0 && (oneChar == "-" || oneChar == "+"))
			{
				continue;
			}
			if (oneChar < "0" || oneChar > "9")
			{
				return false;
			}
		}
		return true;
	}
	function isNumber(inputVal) 
	{
		var oneDecimal = false;
		var inputStr = "" + inputVal;
		for (var i = 0; i < inputStr.length; i++) 
		{
			var oneChar = inputStr.charAt(i);
			if (i == 0 && (oneChar == "-" || oneChar == "+"))
			{
				continue;
			}
			if (oneChar == "." && !oneDecimal) 
			{
				oneDecimal = true;
				continue;
			}
			if (oneChar < "0" || oneChar > "9")
			{
				return false;
			}
		}
		return true;
	}
	function isValidInput(f, index, latLongForm) 
	{
		if (f["day"].value == "") 
		{	
			alert("Você deve digitar um valor numérico para o Dia antes de efetuar o cálculo.");
			return false;
		}
		else if (f["year"].value == "") 
		{	
			alert("Você deve digitar um valor numérico para o Ano antes de efetuar o cálculo.");
			return false;
		}
		else if (!isPosInteger(f["day"].value) || f["day"].value == 0)
		{
			alert("O Dia deve ser um número inteiro e positivo.");
			return false;
		}
		else if (!isInteger(f["year"].value)) 
		{
			alert("O Ano deve ser um número inteiro e positivo.");
			return false;
		}
		else if ( (f["year"].value < -1000) || (f["year"].value > 3000) )
		{
			alert("Este cálculo funciona para valores compreendidos entre os anos -1000 até 3000.");
			return false;
		}
		else if ((index != 1) && (f["day"].value > monthList[index].numdays)) 
		{
			alert("Existem somente " + monthList[index].numdays + " dias em " 
				+ monthList[index].name + ".");
			return false;
		}
		else if (index == 1) 
		{	
			if (isLeapYear(f["year"].value)) {	
				if (f["day"].value > (monthList[index].numdays + 1)) 
				{
					alert("Existem somente " + (monthList[index].numdays + 1) 
						+ " dias em  " + monthList[index].name + ".");
					return false;
				}
				else
					return true;
			}
			else 
			{	
				if (f["day"].value > monthList[index].numdays) 
				{
					alert("Existem somente " + monthList[index].numdays 
						+ " dias em  " + monthList[index].name + ".");
					return false;
				}
				else
					return true;
			}
		}
		else 
			return true;	
	}
	function convLatLong(f)
	{
		if(f["latDeg"].value == "")
		{
			f["latDeg"].value = 0;
		}
		if(f["latMin"].value == "")
		{
			f["latMin"].value = 0;
		}
		if(f["latSec"].value == "")
		{
			f["latSec"].value = 0;
		}
		if(f["lonDeg"].value == "")
		{
			f["lonDeg"].value = 0;
		}
		if(f["lonMin"].value == "")
		{
			f["lonMin"].value = 0;
		}
		if(f["lonSec"].value == "")
		{
			f["lonSec"].value = 0;
		}

		var neg = 0;
		if(f["latDeg"].value.charAt(0) == '-') 
		{
			neg = 1;
		}
		if(neg != 1)
		{
			var latSeconds = (parseFloat(f["latDeg"].value))*3600 
				+ parseFloat(f["latMin"].value)*60 
				+ parseFloat(f["latSec"].value)*1;

			f["latDeg"].value = Math.floor(latSeconds/3600);
			f["latMin"].value = Math.floor((latSeconds
				- (parseFloat(f["latDeg"].value)*3600))/60);
			f["latSec"].value = Math.floor((latSeconds
				- (parseFloat(f["latDeg"].value)*3600) 
				- (parseFloat(f["latMin"].value)*60)) + 0.5);
		}
		else if(parseFloat(f["latDeg"].value) > -1)
		{
			var latSeconds = parseFloat(f["latDeg"].value)*3600 
				- parseFloat(f["latMin"].value)*60 
				- parseFloat(f["latSec"].value)*1;

			f["latDeg"].value = "-0";
			f["latMin"].value = Math.floor((-latSeconds)/60);
			f["latSec"].value = Math.floor( (-latSeconds 
				- (parseFloat(f["latMin"].value)*60)) + 0.5);
		}
		else
		{
			var latSeconds = parseFloat(f["latDeg"].value)*3600 
				- parseFloat(f["latMin"].value)*60 
				- parseFloat(f["latSec"].value)*1;

			f["latDeg"].value = Math.ceil(latSeconds/3600);
			f["latMin"].value = Math.floor((-latSeconds
				+ (parseFloat(f["latDeg"].value)*3600))/60);
			f["latSec"].value = Math.floor((-latSeconds
				+ (parseFloat(f["latDeg"].value)*3600) 
				- (parseFloat(f["latMin"].value)*60)) + 0.5);
		}
		neg = 0;
		if(f["lonDeg"].value.charAt(0) == '-') 
		{
			neg = 1;
		}
		if(neg != 1)
		{
			var lonSeconds = parseFloat(f["lonDeg"].value)*3600 
				+ parseFloat(f["lonMin"].value)*60 
				+ parseFloat(f["lonSec"].value)*1;
			f["lonDeg"].value = Math.floor(lonSeconds/3600);
			f["lonMin"].value = Math.floor((lonSeconds
				- (parseFloat(f["lonDeg"].value)*3600))/60);
			f["lonSec"].value = Math.floor((lonSeconds
				- (parseFloat(f["lonDeg"].value)*3600)
				- (parseFloat(f["lonMin"].value))*60) + 0.5);
		}
		else if(parseFloat(f["lonDeg"].value) > -1)
		{
			var lonSeconds = parseFloat(f["lonDeg"].value)*3600 
				- parseFloat(f["lonMin"].value)*60 
				- parseFloat(f["lonSec"].value)*1;

			f["lonDeg"].value = "-0";
			f["lonMin"].value = Math.floor((-lonSeconds)/60);
			f["lonSec"].value = Math.floor((-lonSeconds
				- (parseFloat(f["lonMin"].value)*60)) + 0.5);
		}
		else
		{
			var lonSeconds = parseFloat(f["lonDeg"].value)*3600 
				- parseFloat(f["lonMin"].value)*60 
				- parseFloat(f["lonSec"].value)*1;
			f["lonDeg"].value = Math.ceil(lonSeconds/3600);
			f["lonMin"].value = Math.floor((-lonSeconds
				+ (parseFloat(f["lonDeg"].value)*3600))/60);
			f["lonSec"].value = Math.floor((-lonSeconds
				+ (parseFloat(f["lonDeg"].value)*3600)
				- (parseFloat(f["lonMin"].value)*60)) + 0.5);
		}
		if(latSeconds > 324000)
		{
			alert("Você deve digitar um número válido para a latitude.\n  Valor ajustado para = 89.8.");
			f["latDeg"].value = 89.8;
			f["latMin"].value = 0;
			f["latSec"].value = 0;
		}
		if(latSeconds < -324000)
		{
			alert("Você deve digitar um número válido para a latitude.\n  Valor ajustado para = -89.8.");
			f["latDeg"].value = -89.8;
			f["latMin"].value = 0;
			f["latSec"].value = 0;
		}
		if(lonSeconds > 648000)
		{
			alert("Você deve digitar um número válido para a longitude.\n  Valor ajustado para = 180.");
			f["lonDeg"].value = 180;
			f["lonMin"].value = 0;
			f["lonSec"].value = 0;
		}
		if(lonSeconds < -648000)
		{
			alert("Você deve digitar um número válido para a longitude.\n  Valor ajustado para = -180.");
			f["lonDeg"].value = -180;
			f["lonMin"].value = 0;
			f["lonSec"].value =0;
		}
	}
	function radToDeg(angleRad) 
	{
		return (180.0 * angleRad / Math.PI);
	}
	function degToRad(angleDeg) 
	{
		return (Math.PI * angleDeg / 180.0);
	}
	function calcDayOfYear(mn, dy, lpyr) 
	{
		var k = (lpyr ? 1 : 2);
		var doy = Math.floor((275 * mn)/9) - k * Math.floor((mn + 9)/12) + dy -30;
		return doy;
	}
	function calcDayOfWeek(juld)
	{
		var A = (juld + 1.5) % 7;
		var DOW = (A==0)?"Sunday":(A==1)?"Monday":(A==2)?"Tuesday":(A==3)?"Wednesday":(A==4)?"Thursday":(A==5)?"Friday":"Saturday";
		return DOW;
	}
	function calcJD(year, month, day)
	{
		if (month <= 2) {
			year -= 1;
			month += 12;
		}
		var A = Math.floor(year/100);
		var B = 2 - A + Math.floor(A/4);

		var JD = Math.floor(365.25*(year + 4716)) + Math.floor(30.6001*(month+1)) + day + B - 1524.5;
		return JD;
	}
	function calcDateFromJD(jd)
	{
		var z = Math.floor(jd + 0.5);
		var f = (jd + 0.5) - z;

		if (z < 2299161) {
			var A = z;
		} else {
			alpha = Math.floor((z - 1867216.25)/36524.25);
			var A = z + 1 + alpha - Math.floor(alpha/4);
		}

		var B = A + 1524;
		var C = Math.floor((B - 122.1)/365.25);
		var D = Math.floor(365.25 * C);
		var E = Math.floor((B - D)/30.6001);
		var day = B - D - Math.floor(30.6001 * E) + f;
		var month = (E < 14) ? E - 1 : E - 13;
		var year = (month > 2) ? C - 4716 : C - 4715;
		return (day + "-" + monthList[month-1].name + "-" + year);
	}
	function calcDayFromJD(jd)
	{
		var z = Math.floor(jd + 0.5);
		var f = (jd + 0.5) - z;
		if (z < 2299161) {
			var A = z;
		} else {
			alpha = Math.floor((z - 1867216.25)/36524.25);
			var A = z + 1 + alpha - Math.floor(alpha/4);
		}
		var B = A + 1524;
		var C = Math.floor((B - 122.1)/365.25);
		var D = Math.floor(365.25 * C);
		var E = Math.floor((B - D)/30.6001);

		var day = B - D - Math.floor(30.6001 * E) + f;
		var month = (E < 14) ? E - 1 : E - 13;
		var year = (month > 2) ? C - 4716 : C - 4715;
		return ((day<10 ? "0" : "") + day + monthList[month-1].abbr);
	}
	function calcTimeJulianCent(jd)
	{
		var T = (jd - 2451545.0)/36525.0;
		return T;
	}
	function calcJDFromJulianCent(t)
	{
		var JD = t * 36525.0 + 2451545.0;
		return JD;
	}
	function calcGeomMeanLongSun(t)
	{
		var L0 = 280.46646 + t * (36000.76983 + 0.0003032 * t);
		while(L0 > 360.0)
		{
			L0 -= 360.0;
		}
		while(L0 < 0.0)
		{
			L0 += 360.0;
		}
		return L0;		
	}
	function calcGeomMeanAnomalySun(t)
	{
		var M = 357.52911 + t * (35999.05029 - 0.0001537 * t);
		return M;		
	}
	function calcEccentricityEarthOrbit(t)
	{
		var e = 0.016708634 - t * (0.000042037 + 0.0000001267 * t);
		return e;		
	}
	function calcSunEqOfCenter(t)
	{
		var m = calcGeomMeanAnomalySun(t);
		var mrad = degToRad(m);
		var sinm = Math.sin(mrad);
		var sin2m = Math.sin(mrad+mrad);
		var sin3m = Math.sin(mrad+mrad+mrad);
		var C = sinm * (1.914602 - t * (0.004817 + 0.000014 * t)) + sin2m * (0.019993 - 0.000101 * t) + sin3m * 0.000289;
		return C;		
	}
	function calcSunTrueLong(t)
	{
		var l0 = calcGeomMeanLongSun(t);
		var c = calcSunEqOfCenter(t);
		var O = l0 + c;
		return O;	
	}
	function calcSunTrueAnomaly(t)
	{
		var m = calcGeomMeanAnomalySun(t);
		var c = calcSunEqOfCenter(t);
		var v = m + c;
		return v;		
	}
	function calcSunRadVector(t)
	{
		var v = calcSunTrueAnomaly(t);
		var e = calcEccentricityEarthOrbit(t);
		var R = (1.000001018 * (1 - e * e)) / (1 + e * Math.cos(degToRad(v)));
		return R;		
	}
	function calcSunApparentLong(t)
	{
		var o = calcSunTrueLong(t);
		var omega = 125.04 - 1934.136 * t;
		var lambda = o - 0.00569 - 0.00478 * Math.sin(degToRad(omega));
		return lambda;		
	}
	function calcMeanObliquityOfEcliptic(t)
	{
		var seconds = 21.448 - t*(46.8150 + t*(0.00059 - t*(0.001813)));
		var e0 = 23.0 + (26.0 + (seconds/60.0))/60.0;
		return e0;		
	}
	function calcObliquityCorrection(t)
	{
		var e0 = calcMeanObliquityOfEcliptic(t);
		var omega = 125.04 - 1934.136 * t;
		var e = e0 + 0.00256 * Math.cos(degToRad(omega));
		return e;		
	}
	function calcSunRtAscension(t)
	{
		var e = calcObliquityCorrection(t);
		var lambda = calcSunApparentLong(t);
		var tananum = (Math.cos(degToRad(e)) * Math.sin(degToRad(lambda)));
		var tanadenom = (Math.cos(degToRad(lambda)));
		var alpha = radToDeg(Math.atan2(tananum, tanadenom));
		return alpha;		
        }
	function calcSunDeclination(t)
	{
		var e = calcObliquityCorrection(t);
		var lambda = calcSunApparentLong(t);
		var sint = Math.sin(degToRad(e)) * Math.sin(degToRad(lambda));
		var theta = radToDeg(Math.asin(sint));
		return theta;		
	}
	function calcEquationOfTime(t)
	{
		var epsilon = calcObliquityCorrection(t);
		var l0 = calcGeomMeanLongSun(t);
		var e = calcEccentricityEarthOrbit(t);
		var m = calcGeomMeanAnomalySun(t);
		var y = Math.tan(degToRad(epsilon)/2.0);
		y *= y;
		var sin2l0 = Math.sin(2.0 * degToRad(l0));
		var sinm   = Math.sin(degToRad(m));
		var cos2l0 = Math.cos(2.0 * degToRad(l0));
		var sin4l0 = Math.sin(4.0 * degToRad(l0));
		var sin2m  = Math.sin(2.0 * degToRad(m));
		var Etime = y * sin2l0 - 2.0 * e * sinm + 4.0 * e * y * sinm * cos2l0
				- 0.5 * y * y * sin4l0 - 1.25 * e * e * sin2m;
		return radToDeg(Etime)*4.0;	
	}
	function calcHourAngleSunrise(lat, solarDec)
	{
		var latRad = degToRad(lat);
		var sdRad  = degToRad(solarDec)
		var HAarg = (Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad));
		var HA = (Math.acos(Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad)));
		return HA;		
	}
	function calcHourAngleSunset(lat, solarDec)
	{
		var latRad = degToRad(lat);
		var sdRad  = degToRad(solarDec)
		var HAarg = (Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad));
		var HA = (Math.acos(Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad)));
		return -HA;		
	}
	function calcSunriseUTC(JD, latitude, longitude)
	{
		var t = calcTimeJulianCent(JD);
		var eqTime = calcEquationOfTime(t);
		var solarDec = calcSunDeclination(t);
		var hourAngle = calcHourAngleSunrise(latitude, solarDec);
		var delta = longitude - radToDeg(hourAngle);
		var timeDiff = 4 * delta;	
		var timeUTC = 720 + timeDiff - eqTime;	
		var newt = calcTimeJulianCent(calcJDFromJulianCent(t) + timeUTC/1440.0); 
		eqTime = calcEquationOfTime(newt);
		solarDec = calcSunDeclination(newt);
		hourAngle = calcHourAngleSunrise(latitude, solarDec);
		delta = longitude - radToDeg(hourAngle);
		timeDiff = 4 * delta;
		timeUTC = 720 + timeDiff - eqTime; 
		return timeUTC;
	}
	function calcSolNoonUTC(t, longitude)
	{
		var newt = calcTimeJulianCent(calcJDFromJulianCent(t) + 0.5 + longitude/360.0); 
		var eqTime = calcEquationOfTime(t);
		var solarNoonDec = calcSunDeclination(t);
		var solNoonUTC = 720 + (longitude * 4) - eqTime; 
		return solNoonUTC;
	}
	function calcSunsetUTC(JD, latitude, longitude)
	{
		var t = calcTimeJulianCent(JD);
		var eqTime = calcEquationOfTime(t);
		var solarDec = calcSunDeclination(t);
		var hourAngle = calcHourAngleSunset(latitude, solarDec);
		var delta = longitude - radToDeg(hourAngle);
		var timeDiff = 4 * delta;
		var timeUTC = 720 + timeDiff - eqTime;
		var newt = calcTimeJulianCent(calcJDFromJulianCent(t) + timeUTC/1440.0); 
		eqTime = calcEquationOfTime(newt);
		solarDec = calcSunDeclination(newt);
		hourAngle = calcHourAngleSunset(latitude, solarDec);
		delta = longitude - radToDeg(hourAngle);
		timeDiff = 4 * delta;
		timeUTC = 720 + timeDiff - eqTime; 
		return timeUTC;
	}
	function getLatitude(latLongForm)
	{
		var neg = 0;
		var degs = parseFloat(latLongForm["latDeg"].value);
		if (latLongForm["latDeg"].value.charAt(0) == '-') 
		{
			neg = 1;
		}
		if(latLongForm["latMin"].value == "")
		{
			latLongForm["latMin"].value = 0;
		}
		if(latLongForm["latSec"].value == "")
		{
			latLongForm["latSec"].value = 0;
		}
		var mins = parseFloat(latLongForm["latMin"].value);
		var secs = parseFloat(latLongForm["latSec"].value);
		if(neg != 1)
		{
			var decLat = degs + (mins / 60) + (secs / 3600);
		} else if(neg == 1)
		{
			var decLat = degs - (mins / 60) - (secs / 3600);
		} else 
		{
			return -9999;
		}
		return decLat;
	}	
	function getLongitude(latLongForm)
	{
		var neg = 0;
		var degs = parseFloat(latLongForm["lonDeg"].value);
		if (latLongForm["lonDeg"].value.charAt(0) == '-') 
		{
			neg = 1;
		}
		if(latLongForm["lonMin"].value == "")
		{
			latLongForm["lonMin"].value = 0;
		}
		if(latLongForm["lonSec"].value == "")
		{
			latLongForm["lonSec"].value = 0;
		}
		var mins = parseFloat(latLongForm["lonMin"].value);
		var secs = parseFloat(latLongForm["lonSec"].value);
		var decLon = degs + (mins / 60) + (secs / 3600);
		if(neg != 1)
		{
			var decLon = degs + (mins / 60) + (secs / 3600);
		} else if(neg == 1)
		{
			var decLon = degs - (mins / 60) - (secs / 3600);
		} else 
		{
			return -9999;
		}
		return decLon;
	}	
	function findRecentSunrise(jd, latitude, longitude)
	{
		var julianday = jd;
		var time = calcSunriseUTC(julianday, latitude, longitude);
		while(!isNumber(time)){
			julianday -= 1.0;
			time = calcSunriseUTC(julianday, latitude, longitude);
		}
		return julianday;
	}
	function findRecentSunset(jd, latitude, longitude)
	{
		var julianday = jd;
		var time = calcSunsetUTC(julianday, latitude, longitude);
		while(!isNumber(time)){
			julianday -= 1.0;
			time = calcSunsetUTC(julianday, latitude, longitude);
		}
		return julianday;
	}
	function findNextSunrise(jd, latitude, longitude)
	{
		var julianday = jd;
		var time = calcSunriseUTC(julianday, latitude, longitude);
		while(!isNumber(time)){
			julianday += 1.0;
			time = calcSunriseUTC(julianday, latitude, longitude);
		}
		return julianday;
	}
	function findNextSunset(jd, latitude, longitude)
	{
		var julianday = jd;
		var time = calcSunsetUTC(julianday, latitude, longitude);
		while(!isNumber(time)){
			julianday += 1.0;
			time = calcSunsetUTC(julianday, latitude, longitude);
		}
		return julianday;
	}
	function timeString(minutes)
	{
		var floatHour = minutes / 60;
		var hour = Math.floor(floatHour);
		var floatMinute = 60 * (floatHour - Math.floor(floatHour));
		var minute = Math.floor(floatMinute);
		var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
		var second = Math.floor(floatSec);
		var timeStr = hour + ":";
		if (minute < 10)	
			timeStr += "0" + minute + ":";
		else
			timeStr += minute + ":";
		if (second < 10)	
			timeStr += "0" + second;
		else
			timeStr += second;
		return timeStr;
	}
	function timeStringShortAMPM(minutes, JD)
	{
		var julianday = JD;
		var floatHour = minutes / 60;
		var hour = Math.floor(floatHour);
		var floatMinute = 60 * (floatHour - Math.floor(floatHour));
		var minute = Math.floor(floatMinute);
		var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
		var second = Math.floor(floatSec);
		var PM = false;
		minute += (second >= 30)? 1 : 0;
		if (minute >= 60) 
		{
			minute -= 60;
			hour ++;
		}
		var daychange = false;
		if (hour > 23) 
		{
			hour -= 24;
			daychange = true;
			julianday += 1.0;
		}
		if (hour < 0)
		{
			hour += 24;
			daychange = true;
			julianday -= 1.0;
		}
		if (hour == 0)
		{
			PM = false;
			hour = 12;
		}
		var timeStr = hour + ":";
		if (minute < 10)	
			timeStr += "0" + minute ;
		else
			timeStr += "" + minute ;
		if (daychange) return timeStr + " " + calcDayFromJD(julianday);
		return timeStr;
	}
	function timeStringDate(minutes, JD)
	{
		var julianday = JD;
		var floatHour = minutes / 60;
		var hour = Math.floor(floatHour);
		var floatMinute = 60 * (floatHour - Math.floor(floatHour));
		var minute = Math.floor(floatMinute);
		var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
		var second = Math.floor(floatSec);
		minute += (second >= 30)? 1 : 0;
		if (minute >= 60) 
		{
			minute -= 60;
			hour ++;
		}
		var daychange = false;
		if (hour > 23) 
		{
			hour -= 24;
			julianday += 1.0;
			daychange = true;
		}
		if (hour < 0)
		{
			hour += 24;
			julianday -= 1.0;
			daychange = true;
		}
		var timeStr = hour + ":";
		if (minute < 10)	
			timeStr += "0" + minute;
		else
			timeStr += minute;
		if (daychange) return timeStr + " " + calcDayFromJD(julianday);
		return timeStr;
	}
	function calcSun(riseSetForm, latLongForm, index, index2) 
	{
		if(index2 != 0)
		{
			setLatLong(latLongForm, index2);
		}
		var latitude = getLatitude(latLongForm);
		var longitude = getLongitude(latLongForm);
		var indexRS = riseSetForm.mos.selectedIndex
		if (isValidInput(riseSetForm, indexRS, latLongForm)) 
		{
			if((latitude >= -90) && (latitude < -89.8))
			{
				alert("Todos os valores de latitude entre 89.8 e 90 S\n serão ajustados para -89.8");
				latLongForm["latDeg"].value = -89.8;
				latitude = -89.8;
			}
			if ((latitude <= 90) && (latitude > 89.8))
			{
				alert("Todos os valores de latitude entre 89.8 e 90 N\n serão ajustados para -89.8");
				latLongForm["latDeg"].value = 89.8;
				latitude = 89.8;
			}
			var JD = (calcJD(parseFloat(riseSetForm["year"].value), indexRS + 1, parseFloat(riseSetForm["day"].value)));
			var dow = calcDayOfWeek(JD);
			var doy = calcDayOfYear(indexRS + 1, parseFloat(riseSetForm["day"].value), isLeapYear(riseSetForm["year"].value));
			var T = calcTimeJulianCent(JD);
			var alpha = calcSunRtAscension(T);
			var theta = calcSunDeclination(T);
			var Etime = calcEquationOfTime(T);
			var eqTime = Etime;
			var solarDec = theta;
			riseSetForm["eqTime"].value = (Math.floor(100*eqTime))/100;
			riseSetForm["solarDec"].value = (Math.floor(100*(solarDec)))/100;
			var nosunrise = false;
			var riseTimeGMT = calcSunriseUTC(JD, latitude, longitude);
			if (!isNumber(riseTimeGMT))
			{
				nosunrise = true;
			}
			var nosunset = false;
			var setTimeGMT = calcSunsetUTC(JD, latitude, longitude);
			if (!isNumber(setTimeGMT))
			{
				nosunset = true;
			}
			var daySavings = YesNo[index].value;  
			var zone = latLongForm["hrsToGMT"].value;
			if(zone > 12 || zone < -12.5)
			{
				alert("O offset deve estar entre -12.5 e 12.  \n Valor ajustado para\"Off-Set\"=0");
				zone = "0";
				latLongForm["hrsToGMT"].value = zone;
			}
			if (!nosunrise)		
			{
				var riseTimeLST = riseTimeGMT - (60 * zone) + daySavings;	
				var riseStr = timeStringShortAMPM(riseTimeLST, JD);
				var utcRiseStr = timeStringDate(riseTimeGMT, JD);
			}
			if (!nosunset)		
			{
				var setTimeLST = setTimeGMT - (60 * zone) + daySavings;
				var setStr = timeStringShortAMPM(setTimeLST, JD);
				var utcSetStr = timeStringDate(setTimeGMT, JD);
				riseSetForm["sunset"].value = setStr;
			}
			var solNoonGMT = calcSolNoonUTC(T, longitude);
			var solNoonLST = solNoonGMT - (60 * zone) + daySavings;
			var solnStr = timeString(solNoonLST);
			var utcSolnStr = timeString(solNoonGMT);
    		convLatLong(latLongForm);
			if(nosunrise)
			{ 
				if ( ((latitude > 66.4) && (doy > 79) && (doy < 267)) ||
				   ((latitude < -66.4) && ((doy < 83) || (doy > 263))) )
				{
					newjd = findRecentSunrise(JD, latitude, longitude);
					newtime = calcSunriseUTC(newjd, latitude, longitude)
						 - (60 * zone) + daySavings;
					if (newtime > 1440)
					{
						newtime -= 1440;
						newjd += 1.0;
					}
					if (newtime < 0)
					{
						newtime += 1440;
						newjd -= 1.0;
					}
						timeStringAMPMDate(newtime, newjd);
				}
				else if ( ((latitude > 66.4) && ((doy < 83) || (doy > 263))) ||
					((latitude < -66.4) && (doy > 79) && (doy < 267)) )
				{
					newjd = findNextSunrise(JD, latitude, longitude);
					newtime = calcSunriseUTC(newjd, latitude, longitude)
						 - (60 * zone) + daySavings;
					if (newtime > 1440)
					{
						newtime -= 1440;
						newjd += 1.0;
					}
					if (newtime < 0)
					{
						newtime += 1440;
						newjd -= 1.0;
					}
						timeStringAMPMDate(newtime, newjd);
				}
				else 
				{
					alert("Não foi possível encontrar o horário do nascer do sol!");
				}
			}

			if(nosunset)
			{ 
				if ( ((latitude > 66.4) && (doy > 79) && (doy < 267)) ||
				   ((latitude < -66.4) && ((doy < 83) || (doy > 263))) )
				{
					newjd = findNextSunset(JD, latitude, longitude);
					newtime = calcSunsetUTC(newjd, latitude, longitude)
						 - (60 * zone) + daySavings;
					if (newtime > 1440)
					{
						newtime -= 1440;
						newjd += 1.0;
					}
					if (newtime < 0)
					{
						newtime += 1440;
						newjd -= 1.0;
					}
					riseSetForm["sunset"].value = 
						timeStringAMPMDate(newtime, newjd);
				}
				else if ( ((latitude > 66.4) && ((doy < 83) || (doy > 263))) ||
					((latitude < -66.4) && (doy > 79) && (doy < 267)) )
				{
					newjd = findRecentSunset(JD, latitude, longitude);
					newtime = calcSunsetUTC(newjd, latitude, longitude)
						 - (60 * zone) + daySavings;
					if (newtime > 1440)
					{
						newtime -= 1440;
						newjd += 1.0;
					}
					if (newtime < 0)
					{
						newtime += 1440;
						newjd -= 1.0;
					}
					riseSetForm["sunset"].value = 
						timeStringAMPMDate(newtime, newjd);
				}

				else 
				{
					alert ("Não foi possível encontrar o horário do pôr-do-sol!");
				}
			}
		}
	}