<!--
function cal_bmi(kg, cm){

   m = cm/100;
   h2 = m * m;
   bmi = kg/h2;
   f_bmi = Math.floor(bmi);
   diff  = bmi - f_bmi;
   diff = diff * 10;
   diff = Math.round(diff);
   if (diff == 10){
      // Need to bump up the whole thing instead
      f_bmi += 1;
      diff = 0;
   }
   bmi = f_bmi + "." + diff;
   return bmi;
}
function compute(){
   var f = self.document.forms[1];
   //alert(f.vaha);
   // Set up variables for calculation
   w = f.vaha.value;
   i = parseInt(f.vyska.value);

   // Do validation checking to ensure existence of values

   if (!chkw(i)){
     alert("Prosím, zadajte Vašu výšku.");
     f.vyska.focus();
     return;
   }
   if (!chkw(w)){
     alert("Prosím, zadajte Vašu hmotnosť.");
     f.vaha.focus();
     return;
   }

   f.vasebmi.value = cal_bmi(w, i);
	var MojVysledok = parseFloat(f.vasebmi.value);
	if (MojVysledok < 20 ) {
		f.vystup_1.value = MojVysledok; f.vystup_2.value = ""; f.vystup_3.value = ""; f.vystup_4.value = ""; f.vystup_5.value = ""; }
	else { if (MojVysledok < 25 ) {
		f.vystup_1.value = ""; f.vystup_2.value = MojVysledok; f.vystup_3.value = ""; f.vystup_4.value = ""; f.vystup_5.value = ""; }
	else { if (MojVysledok < 30 ) {
		f.vystup_1.value = ""; f.vystup_2.value = ""; f.vystup_3.value = MojVysledok; f.vystup_4.value = ""; f.vystup_5.value = ""; }
	else { if (MojVysledok < 40 ) {
		f.vystup_1.value = ""; f.vystup_2.value = ""; f.vystup_3.value = ""; f.vystup_4.value = MojVysledok; f.vystup_5.value = ""; }
	else {
		f.vystup_1.value = ""; f.vystup_2.value = ""; f.vystup_3.value = ""; f.vystup_4.value = ""; f.vystup_5.value = MojVysledok;
	} } } }
}

function chkw(w){
   if (isNaN(parseInt(w))){
      return false;
   } else if (w < 0){
  return false;
  }
  else{
  return true;
  }
}

// -->