function swimPaceCompute() {

	// convert distances to kilometers

	var distanceSwim = document.frmSwim.swimDistance.value;

	if (document.frmSwim.swimDistanceUnits[0].checked) {
		distanceSwim = distanceSwim / 1000;
	} else if (document.frmSwim.swimDistanceUnits[1].checked) {
		distanceSwim = distanceSwim * .9144 / 1000;
	} else if (document.frmSwim.swimDistanceUnits[3].checked) {
		distanceSwim = convertMilesToKm(distanceSwim);
	}



	//var secondsSwim = document.frmSwim.swimTimeHours.options[document.frmSwim.swimTimeHours.selectedIndex].value * 60 * 60 + document.frmSwim.swimTimeMinutes.options[document.frmSwim.swimTimeMinutes.selectedIndex].value * 60 + document.frmSwim.swimTimeSeconds.options[document.frmSwim.swimTimeSeconds.selectedIndex].value * 1;
	var secondsSwim = document.frmSwim.swimHH.value * 60 * 60 + document.frmSwim.swimMM.value * 60 + document.frmSwim.swimSS.value * 1;


	var speedSwim = distanceSwim / secondsSwim * 60 * 60;

	var paceSwim = secondsSwim / distanceSwim;

	if(document.frmSwim.swimPaceUnits[0].checked) {
		// /100m
		paceSwim = paceSwim / 1000 * 100;
	} else {
		paceSwim = paceSwim / 1000 * 100 * 0.9144;
	}

	document.frmSwim.swimPace.value = secondsToTime(paceSwim);

	if(document.frmSwim.swimSpeedUnits[1].checked) {

		// convert from km to miles
		speedSwim = convertKmToMiles(speedSwim);
	}

	document.frmSwim.swimSpeed.value = speedSwim;





}


function bikeSpeedCompute() {

	//var secondsBike = document.frmBike.bikeTimeHours.options[document.frmBike.bikeTimeHours.selectedIndex].value * 60 * 60 + document.frmBike.bikeTimeMinutes.options[document.frmBike.bikeTimeMinutes.selectedIndex].value * 60 + document.frmBike.bikeTimeSeconds.options[document.frmBike.bikeTimeSeconds.selectedIndex].value * 1;

	var secondsBike = document.frmBike.bikeHH.value * 60 * 60 + document.frmBike.bikeMM.value * 60 + document.frmBike.bikeSS.value * 1;

	var speedBike = document.frmBike.bikeDistance.value / secondsBike * 60 * 60;

	if(document.frmBike.bikeDistanceUnits[0].checked && document.frmBike.bikeSpeedUnits[1].checked) {

		// convert from km to miles
		speedBike = convertKmToMiles(speedBike);

	} else if (document.frmBike.bikeDistanceUnits[1].checked && document.frmBike.bikeSpeedUnits[0].checked) {

		//convert from miles to km
		speedBike = convertMilesToKm(speedBike);

	}

	document.frmBike.bikeSpeed.value = speedBike;

}


function runPaceCompute() {

	//var secondsRun = document.frmRun.runTimeHours.options[document.frmRun.runTimeHours.selectedIndex].value * 60 * 60 + document.frmRun.runTimeMinutes.options[document.frmRun.runTimeMinutes.selectedIndex].value * 60 + document.frmRun.runTimeSeconds.options[document.frmRun.runTimeSeconds.selectedIndex].value * 1;
	var secondsRun = document.frmRun.runHH.value * 60 * 60 + document.frmRun.runMM.value * 60 + document.frmRun.runSS.value * 1;


	var paceRun = secondsRun / document.frmRun.runDistance.value

	if(document.frmRun.runDistanceUnits[0].checked && document.frmRun.runPaceUnits[1].checked) {

		paceRun = convertMilesToKm(paceRun);

	} else if (document.frmRun.runDistanceUnits[1].checked && document.frmRun.runPaceUnits[0].checked) {

		paceRun = convertKmToMiles(paceRun);

	}



	paceRun = secondsToTime(paceRun)
	document.frmRun.runPace.value = paceRun;


	var speedRun = document.frmRun.runDistance.value / secondsRun * 60 * 60;

	if(document.frmRun.runDistanceUnits[0].checked && document.frmRun.runSpeedUnits[1].checked) {

		// convert from km to miles
		speedRun = convertKmToMiles(speedRun);

	} else if (document.frmRun.runDistanceUnits[1].checked && document.frmRun.runSpeedUnits[0].checked) {

		//convert from miles to km
		speedRun = convertMilesToKm(speedRun);

	}

	document.frmRun.runSpeed.value = speedRun;



}


function secondsToTime(secs) {

	var ret = "";                 // Return value
	var s = Math.floor(secs); 	  // Whole seconds
	var m = Math.floor(s/60);     // Whole minutes
	var h = Math.floor(m/60);     // Whole hours

	if (h < 10)
	 ret += "0";
	ret += h;

	ret += ":";

	var m = m%60;

	if (m < 10)
	 ret += "0";
	ret += m;

	var s = s%60;

	ret += ":";

	if (s < 10)
	 ret += "0";
	ret += s;

	return ret;

}

function convertMilesToKm(inputValue) {
	return inputValue * 1.609344;
}

function convertKmToMiles(inputValue) {
	return inputValue * 0.621371192;
}

function convertMToYd(inputValue) {
	return inputValue / 0.9144;
}

function convertYdToM(inputValue) {
	return inputValue * 0.9144;
}


function distanceCompute() {

	var inputDistance = document.frmDistance.inputDistance.value;

	// convert everything back to meters

	if (document.frmDistance.inputDistanceUnits[1].checked) {
		inputDistance = convertYdToM(inputDistance);
	} else if (document.frmDistance.inputDistanceUnits[2].checked) {
		inputDistance = inputDistance * 1000;
	} else if (document.frmDistance.inputDistanceUnits[3].checked) {
		inputDistance = convertMilesToKm(inputDistance) * 1000;
	}

	if (document.frmDistance.outputDistanceUnits[1].checked) {
		outputDistance = convertMToYd(inputDistance)
	} else if (document.frmDistance.outputDistanceUnits[2].checked) {
		outputDistance = inputDistance / 1000;
	} else if (document.frmDistance.outputDistanceUnits[3].checked) {
		outputDistance = convertKmToMiles(inputDistance / 1000);
	} else {
		outputDistance = inputDistance;
	}

	document.frmDistance.outputDistance.value = outputDistance;

}

function runPaceConvert() {

	var timeSeconds = document.frmRunPace.runHH.value * 60 * 60 + document.frmRunPace.runMM.value * 60 + document.frmRunPace.runSS.value * 1;
	var secondsPerKM = timeSeconds;

	// If Min/Mile entered, convert to seconds per Km
	if (document.frmRunPace.runPaceUnits0[1].checked) {
		secondsPerKM = convertKmToMiles(secondsPerKM);
	}

	var outputSeconds = secondsPerKM;

	// If Min/Mile requested, convert to Min/Mile
	if (document.frmRunPace.runPaceUnits[1].checked) {
		outputSeconds = convertMilesToKm(secondsPerKM);
	}

	// Output converted pace time
	document.frmRunPace.runPace.value = secondsToTime(outputSeconds);

	var kPH = 1 / (secondsPerKM / 60 / 60 );

	var outputSpeed = kPH;

	// If MPH, then convert
	if (document.frmRunPace.runSpeedUnits[1].checked) {
		outputSpeed = convertKmToMiles(outputSpeed);
	}

	document.frmRunPace.runSpeed.value = outputSpeed;


}