// JavaScript Document

function calculate_bmi() {
	var feet = document.getElementById('feet').value;
	var inches = document.getElementById('inches').value;
	var weight = document.getElementById('weight').value;
	
	var height = (feet * 12) + (inches * 1);
	var bmi = Math.round(((weight * 703)/(height * height))*10)/10;
	
	if ( bmi < 18.5 ) {
		var bmiDescription = "Underweight";
	} else if ( bmi >= 18.5 && bmi <= 24.9 ) {
		var bmiDescription = "Normal";
	} else if ( bmi >= 25 && bmi <= 29.9 ) {
		var bmiDescription = "Overweight";
	} else if ( bmi >= 30 ) {
		var bmiDescription = "Obese";
	}
	
	var bmiHTML = "Your BMI:<br /><span style='font-size:14pt; color:#CC0000'>" + bmi + " (" + bmiDescription + ") </span>";
	
	document.getElementById('bmi_calculator').innerHTML = bmiHTML;
	
	return false;
}