/** * * Common * */ 
function doConversion(func) { 
	fromType = document.getElementById('fromType'); 
	fromTypeId = fromType.value;
	fromTypeName = fromType.options[fromType.selectedIndex].text; 
	toType = document.getElementById('toType'); 
	toTypeId = toType.value; 
	toTypeName = toType.options[toType.selectedIndex].text; 
	value = document.getElementById('conversionInput').value; 
	var result = ''; 
	if (func == 'weight') { 
		result = convertWeight(toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func == 'volume') { 
		result = convertVolume(toTypeId, toTypeName, fromTypeId, fromTypeName, value);
	} else if (func == 'area') { 
		result = convertArea(toTypeId, toTypeName,fromTypeId, fromTypeName, value); 
	} else if (func == 'density') { 
		result = convertDensity(toTypeId, toTypeName, fromTypeId, fromTypeName, value);
	} else if (func == 'length') { 
		result = convertLength(toTypeId,toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func =='metricWeight') { 
		result = convertMetricWeight(toTypeId, toTypeName,fromTypeId, fromTypeName, value); 
	} else if (func == 'force') { 
		result = convertForce(toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func == 'pressure') { 
		result = convertPressure(toTypeId,toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func =='speed') { 
		result = convertSpeed(toTypeId, toTypeName, fromTypeId,fromTypeName, value); 
	} else if (func == 'temperature') { 
		result =convertTemperature(toTypeId, toTypeName, fromTypeId, fromTypeName,value); 
	} else if (func == 'energy') { 
		result = convertEnergy(toTypeId,toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func =='frequency') { 
		result = convertFrequency(toTypeId, toTypeName,fromTypeId, fromTypeName, value); 
	} else if (func == 'power') { 
		result =convertPower(toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func == 'torque') { 
		result = convertTorque(toTypeId,toTypeName, fromTypeId, fromTypeName, value); 
	} else if (func =='astronomical') { 
		result = convertAstronomical(toTypeId, toTypeName,fromTypeId, fromTypeName, value); 
	}

	document.getElementById('conversionResult').value = result; 
} 

function convert(constant, toTypeId, toTypeName, fromTypeId, fromTypeName, value)
{ 
	value = parseFloat(value); 
	if (isNaN(value)) { 
		value = 1; 
	} 
	var result = value * (constant[fromTypeId] / constant[toTypeId]); 
	result = Math.round(result * 1000000) / 1000000; 
	result = commaFormat(result);
	return (value + " " + fromTypeName + " = " + result + " " + toTypeName);
} 

function convertReverse(constant, toTypeId, toTypeName, fromTypeId,fromTypeName, value) { 
	value = parseFloat(value); 
	if (isNaN(value)) {
		value = 1; 
	} 
	var result = value * (constant[toTypeId] / constant[fromTypeId]); 
	result = Math.round(result * 1000000) / 1000000;
	result = commaFormat(result); 
	return (value + " " + fromTypeName + " = " + result + " " + toTypeName); 
} 

function commaFormat(num) { 
	var n = Math.floor(num); 
	var myNum = num + ""; 
	var myDec = ""; 
	if (myNum.indexOf('.',0) > -1){ 
		myDec = myNum.substring(myNum.indexOf('.',0),myNum.length); 
	} 
	var arr = new Array('0'); 
	var i = 0; 
	while (n > 0) { 
		arr[i] = '' + n % 1000; 
		n = Math.floor( n / 1000); 
		i++; 
	} 
	arr = arr.reverse(); 
	for (var i in arr) {
		if (i > 0) { 
			//padding zeros 
			while (arr[i].length < 3) { 
				arr[i] = '0' + arr[i]; 
			} 
		} 
	} 
	return arr.join() + myDec; 
} 

/** * * Weight * */ 
function convertWeight(toTypeId, toTypeName, fromTypeId, fromTypeName, value) {
	var weightConstants = [7000,350,453.6/.2,453.6,7000/24,256,700/6,16,700/48,32.2,700/576,1,.4536,1/14,1/25,1/32.2,.01,.0005,.0004536,1/2240,1/.2850,1/.0977,1/.3232,1/.4105,1/.6136,1/.3799];
	return convertReverse(weightConstants, toTypeId, toTypeName, fromTypeId,fromTypeName, value); 
} 

/** * * Volume * */ 
function convertVolume(toTypeId, toTypeName, fromTypeId, fromTypeName, value) {
	var volumeConstants = [1233.4818,1233.489,102.79015,0.14320184,0.16365924,0.11562712,0.117347778,0.11924047,0.15898729,0.002359737,0.01818384,0.03636872,0.03523907,0.00001,3.6245564,0.45306955,0.000001,0.144,0.001,1000,0.028316846592,0.000016387064,1000000000,1,4168181800,0.000000001,0.764554857984,0.0002273045,0.0002,0.00023658824,0.0001,0.01,0.00075708236,0.00454609,0.0044048838,0.00378541184,0.00014206531,0.00011829412,10000,0.1,0.28640367,0.238480942392,0.000044360294,1,0.001,0.0077,1000,0.000000001,0.000001,0.000028413063,0.00002957353,0.00909218,0.0088097675,0.00056826125,0.00055061047,0.00047317647,0.49097772,0.47696188,0.00002957353,0.00114504,0.00108,0.0011365225,0.0011012209,0.00094635295,0.29094976,0.0000011838776,1,0.15141647];
	return convert(volumeConstants, toTypeId, toTypeName, fromTypeId,fromTypeName, value); 
} 

/** * * Area * */ 
function convertArea(toTypeId, toTypeName, fromTypeId, fromTypeName, value) { 
	var areaConstants = new Array(3344.5094,4046.8564,4046.8726,1/0.01,1/0.049426119,1/0.30248034,1/0.30248034,1/0.0022675737,1/0.0027777777778,1,1/13.705036,1/13.704982,1/1973.5252,1/1973.5173,1/0.0001,1/0.0013950893,1/0.0000013949667,1/0.00098841757,1/0.0027777777778,1/0.11441648,1/0.00000038610061,1/0.1076391,1/0.011960292,1/1e+20,1/4.4683705e-23,1/0.000020763633,1/1.5500031e+7,1/0.0024710439,1/0.0010763867,1/4.7839602,1/3.6363636,1/2755.5611,1/0.29899632,0.09290304,0.092903412,1/0.000024710439,0.00064516,0.092903412/144,1/3.2394817e-8,1/4.2900068e-8,1/1.1172509e-32,1/24.710439,1/10.763867,1,1/0.00000038610216,1/0.00000029155335,1/0.00000029155335,1/0.00000038610061,1/0.00000038610061,1/9.478673,1/1.0502648e-33,1/0.024408103,1/0.039536703,1/0.01,1/1.1959853,1/1.19599,1/1.0725017e-8,1.0e+18,10000,1000000,1e+12,1e-12*0.0069444167,1e-12,1e-24,1e-12,6.4516e-10,0.000001,1e-18,1e-18,1e+30,1e-24,1e-20,1e+24,1e-48,1e+48,1e-42,1e+42,0.0001,6988.96,10000,6555,1600);
	return convert(areaConstants, toTypeId, toTypeName, fromTypeId,fromTypeName, value); 
} 

/** * * Density * */ 
function convertDensity(toTypeId, toTypeName, fromTypeId, fromTypeName, value) {
	var densityConstants = new Array(1,16.0184632652,119.82643,515.3788,1000,1000,1000,1328.939,27679.9,32040,1000000,2643,7658,8906,11370,19300,10510,1000);
	return convert(densityConstants, toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
} 

/** * * Length * */ 
function convertLength(toTypeId, toTypeName, fromTypeId, fromTypeName, value) {
	var constants = new Array(0.0000000001, 0.000000001, 0.000001*2.54*.01, 0.000001, 2.54*.01*.001, .001, .01, 2.54*.01, 2.54*.01*4, 1/4.97097,
			0.2286, 2.54*.01*12, 0.4572, 1/1.1811, 2.54*.01*12*3, 1, 2.54*.01*12*6,
			1/4.97097*25, 20.1168, 1/4.97097*1000, 2.54*.01*12*6*120, 1000,
			1609.344, 1852, 1/4.97097*1000*8*3, 1852*3); 
	return convert(constants,toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
} 

/** * * Metric Weight * */ 
function convertMetricWeight(toTypeId, toTypeName,fromTypeId, fromTypeName, value) { 
	var constants = new Array(0.000001,0.001,0.01,0.10,1,10,100,1000,1000000); 
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName,value); 
} 

/** * * Force * */ 
function convertForce(toTypeId, toTypeName,fromTypeId, fromTypeName, value) { 
	var constants = new Array(1e-5, .00980665, .138255, 1, 4.448222, 9.80665, 4448.222); 
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName,value); 
} 

/** * * Pressure * */ 
function convertPressure(toTypeId,toTypeName, fromTypeId, fromTypeName, value) { 
	var constants = new Array(.1,1,1.488164,9.80665,47.88026,98.0638,98.0665,133.322,248.84,249.082,1333.22,2988.98,3068.167,3376.85,3386.389,6894.757,10066.345,98066.5,100000,101325,6894757,9806650);
	return convert(constants, toTypeId, toTypeName, fromTypeId,fromTypeName, value); 
} 

/** * * Speed * */ 
function convertSpeed(toTypeId, toTypeName, fromTypeId, fromTypeName, value) { 
	if (fromTypeId == 0){ 
		var constants = [1,1/100,1/30.48,1/0.508,1/44.704,1/(100000/60/60),1/335.28,1/51.4444,1/5.588,1/33162.2];
		result = value * constants[toTypeId]; 
	} 
	if (fromTypeId == 1){ 
		var constants = [100,1,1/0.3048,1/0.00508,1/0.44704,1/(1000/60/60),1/3.3528,1/0.514444,1/0.05588,1/331.622];
		result = value * constants[toTypeId]; 
	} 
	if (fromTypeId == 2){ 
		var constants = [30.48,0.3048,1,60,1/(5280/60/60),1/0.91134,1/11,1/1.68781,1/0.18333,1/1087.99869];
		result = value * constants[toTypeId]; 
	} 
	if (fromTypeId == 3){ 
		var constants = [0.508,0.00508,1/60,1,1/88,1/54.68067,1/660,1/101.2685,1/11,1/65279.92126];
		result = value * constants[toTypeId]; 
	} 
	if (fromTypeId == 4){ 
		var constants = [44.704,0.44704,5280/60/60,88,1,1/0.62137,1/7.5,1/1.15078,1/0.125,1/741.81729];
		result = value * constants[toTypeId]; 
	} 
	if (fromTypeId == 5){ 
		var constants = [100000/60/60,1000/60/60,0.91134,54.68067,0.62137,1,1/12.07008,1/1.852,1/0.20117,1/1193.83919];
		result = value * constants[toTypeId]; 
	} 
	if (fromTypeId == 6){ 
		var constants =	[335.28,3.3528,11,660,7.5,12.07008,1,1/0.15344,60,1/98.90897];
		result = value * constants[toTypeId]; 
	} if (fromTypeId == 7){ 
		var constants = [51.4444,0.514444,1.68781,101.2685,1.15078,1.852,0.15344,1,1/0.10862,1/644.62216];
		result = value * constants[toTypeId]; 
	} if (fromTypeId == 8){ 
		var constants = [5.588,0.05588,0.18333,11,0.125,0.20117,1/60,0.10862,1,1/5934.5383];
		result = value * constants[toTypeId]; 
	} if (fromTypeId == 9){ 
		var constants = [33162.2,331.622,1087.99869,65279.92126,741.81729,1193.83919,98.90897,644.62216,5934.5383,1];
		result = value * constants[toTypeId]; 
	}
	result = commaFormat(result);
	return (value + " " + fromTypeName + " = " + result + " " + toTypeName);
} 

/** * * Temperature * */ 
function convertTemperature(toTypeId, toTypeName, fromTypeId, fromTypeName, value) { 
	result = parseFloat(value); 
	if (fromTypeId == 0) { 
		result = result + 273.15; 
	} else if (fromTypeId == 1) { 
		result = ((result - 32)/ 1.8) + 273.15; 
	} else if (fromTypeId == 2) { 
		result = result / 1.8; 
	} else if (fromTypeId == 3) { 
		result = (result * 1.25) + 273.15; 
	} // now convert kelvin to unit 
	if (toTypeId == 0) { 
		result = result - 273.15; 
	} else if (toTypeId == 1) { 
		result = (1.8 * (result - 273.15)) + 32; 
	} else if (toTypeId == 2) { 
		result = result * 1.8; 
	} else if (toTypeId == 3) { 
		result = (result- 273.15) / 1.25; 
	} 
	result = Math.round(result * 1000000) / 1000000;

	return (value + " " + fromTypeName + " = " + result + " " + toTypeName);
} 

/** * * Energy * */ 
function convertEnergy(toTypeId, toTypeName,fromTypeId, fromTypeName, value) { 
	var constants = new Array(1.0e-18,
	3600000, 1055.0559, 1054.3503, 4.1868, 4.1858, 4.184, 1899.1005, 0.01,
	2647795.5, 0.1, 10, 36000, 1.055057e+09, 1.6021773e-19, 0.0000001,
	1.0e+18, 3.6e+21, 1.0e-15, 1.3558179, 0.04214011, 1.3176e+08,
	1.3176e+08, 1.4652e+08, 1.4652e+08, 1.422e+08, 1.3392e+08, 1.422e+08,
	1.5804e+08, 1.6021773e-10, 1.0e+09, 3.6e+12, 4.1858, 4.3597482e-18, 100,
	360000, 2684519.5, 108720000, 0.0070615518, 0.11298483, 1, 4185.8,
	4186.8, 4184, 1.6021773e-16, 4185.8, 9.80665, 1000, 9.80665, 4.184e+12,
	3600000, 101.325, 1.6021773e-13, 1000000, 0.1, 4.184e+15, 3.6e+09,
	9.80665, 0.000001, 0.001, 3.6e+07, 1.0e-09, 1.0e+15, 3.6e+18, 2647795.5,
	1.0e-12, 1.0550559e+21, 1.0550559e+18, 1.6021773e-7, 1.0e+12, 3.6e+15,
	1.0550559e+08, 1.054804e+08, 4185800, 4.184e+09, 2.93076e+10,
	4.1868e+10, 3600, 1, 1.0e-24, 1.0e+24, 3.6e+27, 1.0e-21, 1.0e+21,
	3.6e+24, 1); 
	
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
} 

/** * * Frequency * */ 
function convertFrequency(toTypeId, toTypeName, fromTypeId, fromTypeName, value)
{ 
	var constants = new Array(1, 1/1296000, 1/21600, 1/360, 1,
	1/22619.467, 1/376.99112, 1/6.2831853, 1/3600, 1/60, 1, 1/1000, 1e-12,
	1000, 1000000, 1000000000, 1000000000000); 
	
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
} 

/** * * Power * */ 
function convertPower(toTypeId, toTypeName, fromTypeId, fromTypeName, value) { 
	var constants = new Array(1e-7, 1, 69.733,
	4183.98, .2928751, 1.355818, 746, 1e3, 1e6, 1e9, .001); 
	
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName,value); 
} 

/** * * Torque * */ 
function convertTorque(toTypeId, toTypeName, fromTypeId, fromTypeName, value) { 
	var constants = new Array(1, 1/12, 1/0.13825496, 1/1.357, 1/13558179.5); 
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
} 

/** * * Astronomical * */ 
function convertAstronomical(toTypeId, toTypeName, fromTypeId, fromTypeName,value) { 
	var constants = new Array(1e-3, 1, 1.609344, 1.49598073e8,
	9.460753090819e12, 3.0856780e13); 
	
	return convert(constants, toTypeId, toTypeName, fromTypeId, fromTypeName, value); 
}