Body Mass Index

Description
Just enter your height and your weight, and JavaScript can use a formula created by the Panel on Energy, Obesity, and Body Weight Standards to figure out your Body Mass Index. This index classifies you into one of several categories, from underweight to desirable to obese....View A Script Demo

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">

<HTML>

<HEAD>

<META NAME="Generator" CONTENT="TextPad 4.4">

<LINK href="general.css" rel="stylesheet" type="text/css">

<SCRIPT LANGUAGE="JavaScript">

<!-- Original:  Marat Rikelman (rikelman@bellsouth.net) -->

<!-- Begin

function mod(div,base) {

return Math.round(div - (Math.floor(div/base)*base));

}

function calcBmi() {

var w = document.bmi.weight.value * 1;

var HeightFeetInt = document.bmi.htf.value * 1;

var HeightInchesInt = document.bmi.hti.value * 1;

HeightFeetConvert = HeightFeetInt * 12;

h = HeightFeetConvert + HeightInchesInt;

displaybmi = (Math.round((w * 703) / (h * h)));

var rvalue = true;

if ( (w <= 35) || (w >= 500)  || (h <= 48) || (h >= 120) ) {

alert ("Invalid data.  Please check and re-enter!");

rvalue = false;

}

if (rvalue) {

if (HeightInchesInt > 11) {

reminderinches = mod(HeightInchesInt,12);

document.bmi.hti.value = reminderinches;

document.bmi.htf.value = HeightFeetInt + 

((HeightInchesInt - reminderinches)/12);

document.bmi.answer.value = displaybmi;

}

if (displaybmi <19) 

document.bmi.comment.value = "Underweight";

if (displaybmi >=19 && displaybmi <=25) 

document.bmi.comment.value = "Desirable";

if (displaybmi >=26 && displaybmi <=29) 

document.bmi.comment.value = "prone to health risks";

if (displaybmi >=30 && displaybmi <=40) 

document.bmi.comment.value = "Obese";

if (displaybmi >40) 

document.bmi.comment.value = "Extremely obese";

document.bmi.answer.value = displaybmi; }

return rvalue;

}

//  End -->

</script>

</HEAD>

<BODY Background=../graphics/grayback.jpg>

<center><BR><BR><BR>

<form name=bmi>

<table width=200 border=0>

<tr>

<td align=center><B>Weight:</B>

<input type=text name=weight SIZE=3 maxlength=3> lbs.</td>

</tr>

<tr>

<td align=center><B>Height:</B>

<input type=text name=htf size=1 maxlength=1> Ft.         

<input type=text name=hti size=2 maxlength=2> In.

</td>

</tr>

<tr>

<td align=center>

<input type=button value="Calculate BMI" onclick="calcBmi()">

<hr></td>

</tr>

<tr>

<td><B>Body Mass Index</B>

<input type=text name=answer size=3>

</td>

</tr>

<tr>

<td>

According to the Panel on Energy, Obesity, and 

Body Weight Standards published by American 

Journal of Clinical Nutrition, your category is:<br>

<input type=text name=comment size=25>

</td>

</tr>

</table>

</form>

</center>

</BODY>

</HTML>

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