<!-- Do not copy any part of this script without permission; James T. Griffing, MS, BS; http://www.exrx.net //--><!-- 
function calc (form) {
var S, W, H
S=form.Sex.options[form.Sex.selectedIndex].value
W=form.Weight.value/form.WeightUnit.options[form.WeightUnit.selectedIndex].value
H=form.Height.value*form.HeightUnit.options[form.HeightUnit.selectedIndex].value/100
form.BMI.value = Math.round(W/Math.pow(H,2)*10)/10
  if (S == "Male") {
     form.Ave.value= 25.9;
}
  if (S == "Female") {
     form.Ave.value= 24.9;
}
  if (form.BMI.value >= 40) {
     form.Class.value ="Grade 3 (morbid obesity)"
}
  if (form.BMI.value < 40 && form.BMI.value >= 35) {
     form.Class.value ="Grade 2 obesity"
}
  if (form.BMI.value < 35 && form.BMI.value >= 30) {
     form.Class.value ="Grade 1 obesity"
}
  if (form.BMI.value < 30 && form.BMI.value >= 25) {
     form.Class.value ="Overweight"
}
  if (form.BMI.value < 25 && form.BMI.value >= 18.5) {
     form.Class.value ="Healthy"
}
  if (form.BMI.value < 18.5) {
     form.Class.value ="Underweight"
}
}
//-->