function calculateSU() {
	var starost = document.getElementById('starost').value;
if (starost=="0")
{
alert("Vnesite vsa zahtevana polja!")
}
else
{
var sumax = 220-starost;
var suminm = sumax * 0.6;
var sumaxm = sumax * 0.7;
var suminae = sumax * 0.7;
var sumaxae = sumax * 0.9;
var suminan = sumax * 0.9;
var sumaxan = sumax;
suminmk = suminm.toFixed(0);
sumaxmk = sumaxm.toFixed(0);
suminaek = suminae.toFixed(0);
sumaxaek = sumaxae.toFixed(0);
suminank = suminan.toFixed(0);
sumaxk = sumax.toFixed(0);
document.getElementById('pulzminm').value = suminmk;
document.getElementById('pulzmaxm').value = sumaxmk;
document.getElementById('pulzminae').value = suminaek;
document.getElementById('pulzmaxae').value = sumaxaek;
document.getElementById('pulzminan').value = suminank;
document.getElementById('pulzmaxan').value = sumaxk;
}
}
var sumax = 220-starost;
var su = sumax * 0.6;
suu = su.toFixed(1);
document.form.pulz.value = suu;

function clearField() {
document.getElementById('starost').value = 0;
document.getElementById('pulzminm').value = 0;
document.getElementById('pulzmaxm').value = 0;
document.getElementById('pulzminae').value = 0;
document.getElementById('pulzmaxae').value = 0;
document.getElementById('pulzminan').value = 0;
document.getElementById('pulzmaxan').value = 0;
}

// End -->