<script type="text/javascript">

function calcNeeds(){

var weight = (isNaN(document.wcbubba.weight.value)) ? 0 : document.wcbubba.weight.value;
if (weight == 0) alert("Results will be inaccurate.  Weight is not a valid number.");
var height = (isNaN(document.wcbubba.height.value)) ? 0 : document.wcbubba.height.value;
if (height == 0) alert("Results will be inaccurate.  Height is not a valid number.");
var age = (isNaN(document.wcbubba.height.value)) ? 0 : document.wcbubba.age.value;
if (age == 0) alert("Results will be inaccurate.  Age is not a valid number.");
var activity = (isNaN(document.wcbubba.activity.value)) ? 0 : document.wcbubba.activity.value;

var wmult = (document.wcbubba.units.value == "pounds") ? 2.204 : 1;
var hmult = (document.wcbubba.hunits.value == "inches") ? 2.54 : 1;
var genvar = (document.wcbubba.gender.value == "male") ? 5 : -161;

var BMR = Math.round((((weight / wmult) * 9.99) + ((height * hmult) * 6.25) - (age * 4.92) + genvar) * 1);

var calburn = Math.round((((weight / wmult) * 9.99) + ((height * hmult) * 6.25) - (age * 4.92) + genvar) * activity);

document.getElementById('results').innerHTML = "Your Basal Metabolic Rate is: " + BMR + " calories.<br><br>Your Average Daily Calorie Need Is: " + calburn + " calories";

}
</script>

<form name="wcbubba" id="wcbubba" action="javascript:void()">
Weight:<br> <input type=text name="weight" size="6"> <select name="units"><option value="pounds">pounds<option value="kilos">kg</select><br><br>
Age:<br><input type=text name="age" size="6"> (in years)<br><br>
Gender:<br><select name="gender"><option value="male">male<option value="female">female</select><br><br>
Height:<br> <input type=text name="height" size="6"> <select name="hunits"><option value="inches">inches<option value="cm">cm</select><br><br>
Activity Level:<br> <select name="activity">
<option value="1.2">Little or no exercise and desk job
<option value="1.375">Lightly strenuous exercise or casual sports 1-3 days a week
<option value="1.55">Moderately strenuous exercise or somewhat aggressive sports 3-5 days a week
<option value="1.725">Strenuous exercise or aggressive sports 6-7 days a week
<option value="1.9">Strenuous daily exercise or aggressive sports and a physically active job</select><br><br>
<input type="submit" value="Calculate My Calorie Needs" onClick="calcNeeds();"></form><br>
<div id="results" style="border:1px solid #000;padding:4px;font-size:15px;font-weight:bold;width:400px;">
Your Basal Metabolic Rate is:<br><br>
Your Average Daily Calorie Need is:
</div>

<script type="text/javascript">

function calcBMI(){

// Get Variables and validate to make sure they're numbers, 
// setting them to a value of 1 if they're not.

var weight = (isNaN(document.wcbubba.weight.value)) ? 1 : document.wcbubba.weight.value;

if (weight == 0) alert("Results will be inaccurate.  Weight is not a valid number.");

var height = (isNaN(document.wcbubba.height.value)) ? 1 : document.wcbubba.height.value;

if (height == 0) alert("Results will be inaccurate.  Height is not a valid number.");

// set multipliers based on whether metric or English units were selected

var wmult = (document.wcbubba.units.value == "pounds") ? 2.204 : 1;

// Turns inches/centimeters into meters

var hmult = (document.wcbubba.hunits.value == "inches") ? .0254 : .01;

// Do the calculation (weight in kg divided by the height in meters 
// times itself). The multiplication by 10 and then division by ten
// work in conjunction with Math.round() to round the value to one
// decimal place of precision.

var BMI = Math.round(((weight / wmult)/((height * hmult)*(height * hmult))) *10)/10;

// get the analysis - note this is for general purpose, there is a separate scale for
// Southeast Asian people and there may be more variants on the way

var result = "";
if(BMI < 16.5) result = "severely underweight";
else if((BMI >=16.5)&&(BMI<=18.49)) result = "underweight";
else if((BMI >=18.5)&&(BMI<=25)) result = "normal";
else if((BMI >=25.01)&&(BMI<=30)) result = "overweight";
else if((BMI >=30.01)&&(BMI<=35)) result = "obese";
else if((BMI >=35.01)&&(BMI<=40)) result = "clinically obese";
else result = "morbidly obese";

document.getElementById('results').innerHTML = "Your Body Mass Index (BMI) is: " + BMI + ".<br><br>This would be considered " + result + ".";

}
</script>

<form name="wcbubba" id="wcbubba" action="javascript:void()">
Weight:<br> <input type=text name="weight" size="6"> <select name="units"><option value="pounds">pounds<option value="kilos">kg</select><br><br>

Height:<br> <input type=text name="height" size="6"> <select name="hunits"><option value="inches">inches<option value="cm">cm</select><br><br>

<input type="submit" value="Calculate My BMI" onClick="calcBMI();"></form><br>

<div id="results" style="border:1px solid #000;padding:4px;font-size:15px;font-weight:bold;width:400px;">
Your BMI is:<br><br>
</div>

<script type="text/javascript">
function calcSmokes(){

// GET VALUES FROM FORM, SET VALUE TO ONE IF THE VALUE IN THE FORM IS NOT A NUMBER

var years = (isNaN(document.wcbubba.years.value)) ? 1 : document.wcbubba.years.value;
var smokes = (isNaN(document.wcbubba.smokes.value)) ? 1 : document.wcbubba.smokes.value;
var price = (isNaN(document.wcbubba.price.value)) ? 1 : document.wcbubba.price.value;

// DO CALCULATION OF NUMBER OF CIGARETTES SMOKED ROUNDED TO WHOLE NUMBER

var smoked = parseInt(years * 365.25 * smokes);

// CALCULATE TODAY'S VALUE OF ALL CIGS ROUNDED TO TWO DECIMAL PLACES

var expense = parseInt(((smoked/20) * price) *100) / 100;

// CALCULATE WEIGHT OF TOBACCO IN GRAMS AND POUNDS TO TWO DECIMAL PLACES

var weight = parseInt((smoked * 0.68) *100) / 100;
var pounds = parseInt(((weight/1000) * 2.204) * 100) / 100;

var expout = 'You smoked approximately ' + smoked + ' cigarettes.<br>At current prices, that would cost $' + expense + '.<br>And the weight of the tobacco in all those cigarettes was ' + pounds + ' pounds (' + weight +' grams).';

document.getElementById('totals').innerHTML = expout;
}
</script>

<form name="wcbubba" action="javascript:void();">
Number of years you smoked:<br>
<input type="text" size="5" name="years"><br><br>
Average number of cigarettes you smoked each day:<br>
<input type="text" size="5" name="smokes"><br><br>
Average price for a pack of cigarettes in your area (in dollars)<br>
<input type="text" size="5" name="price"><br><br>
<input type="submit" value="Show My Totals" onclick="calcSmokes()"></form><br>

<div id="totals"></div>