function  calculateBMI() {
  var weight = eval(document.form.weight.value);
  var height = eval(document.form.height.value);
  var height2 = height / 100;
  var BMI = weight  / (height2 * height2);
  document.form.BodyMassIndex.value=custRound(BMI,1);
}

function  calculateHWR() {
  var waist = eval(document.form2.waist.value);
  var hip   = eval(document.form2.hip.value);
  var WHR   = waist / hip;
  document.form2.WaistHipRatio.value=custRound(WHR,2);
}

function custRound(x,places) {
  return (Math.round(x*Math.pow(10,places)))/Math.pow(10,places)
}