function checkNum(thisChar) {
 
	if((thisChar != '0') &&
		(thisChar != '1') &&
		(thisChar != '2') &&
		(thisChar != '3') &&
		(thisChar != '4') &&
		(thisChar != '5') &&
		(thisChar != '6') &&
		(thisChar != '7') &&
		(thisChar != '8') &&
		(thisChar != '9')) {
		
		return false;
		
	} else {
	
	return true;
		
}
}

function checkValue(thisString) {

	var isNum = true;
	var stringLen = thisString.length;
	
	if(stringLen == 0) {
	
	isNum = false;
		
	} else {
	
	for(count = 0; count < stringLen; count++) {
	
	if(!(checkNum(thisString.charAt(count)))) {
		
	isNum = false;
	break;
		
}	
}
}
	
return isNum;
	
}


function Figurecalneeds() {

form = document.calneeds;
feetIndex = form.Feet.selectedIndex;
feet = form.Feet.options[feetIndex].value;
inchesIndex = form.Inches.selectedIndex;
inches = form.Inches.options[inchesIndex].value;
pounds = form.Weight.value;
years = form.Age.value;
activityIndex = form.activity.selectedIndex;
activity = form.activity.options[activityIndex].value;

if((!(checkValue(pounds))) ||
	(!(checkValue(years)))) {
	
	alert('Please enter numbers for weight and age.');
	
} else {

TotalInches = eval(feet*12) + eval(inches);
Centis      = TotalInches * 2.54;
Kilos       = pounds/2.2;
Age         = years;

	if(form.Gender[0].checked) {

<!-- Males -->
	Weight      = 66 + (13.7 * Kilos)
	Height      = 5 * Centis
	Ages        = 6.8 * Age

	} else {

<!-- Females -->
	Weight      = 655 + (9.6 * Kilos)
	Height      = 1.7 * Centis
	Ages        = 4.7 * Age

	}

form.Calories.value = Math.ceil((Weight + Height - Ages) * activity)

}

}

// -->