/////////////////////////////////////////////////////////////
////
////	JavaScript Copyrighted By Seoptics
////			www.seoptics.com
////
/////////////////////////////////////////////////////////////

function calc_bmr()
{
	var f = document.getElementById('bmr_form');
	var sError = ""
	var cm = f.cm.value;
	var kg = f.kg.value.replace(/,/,".");
	var age = f.age.value;
	
	if(cm==""){sError = sError + "U hebt uw lichaamslengte niet ingevuld\n";}
	if(kg==""){sError = sError + "U hebt uw gewicht niet ingevuld\n";}
	if(age==""){sError = sError + "U hebt uw leeftijd niet ingevuld\n";}
	
	if(sError=="")
	{
		if (f.gender.options[0].selected) // man
		{
			kcals = 66.5 + (13.75 * kg) + (5.003 * cm) - (6.775 * age);
		}
		else if (f.gender.options[1].selected) // vrouw
		{
			kcals = 655.1 + (9.563 * kg) + (1.850 * cm) - (4.676 * age);
		}
		kcals = Math.round(kcals);
		f.kcal.value = kcals;
	}
	else
	{
		alert(sError);
	}
}