// Script for BMI calculator
// This script was written by Chris Dawson - www.chrisdawson.org.uk
<!-- hide this script from old browsers
function temp(form)
{
  var a = parseFloat(form.cm.value, 10);
  var b = parseFloat(form.kg.value, 10);
  var c = 0;
  //check for false data 
if (a == 0) { 
 alert("Please enter your height in cm!")
 }
 else if (b == 0) {
 alert("Please enter your weight in kg!")
 }
  e = a / 100
  f =  e * e
  c = b / f;
  d = Math.round(c)
  form.bmi.value = d;
}
// done hiding from old browsers -->