Calculators Effects >>> Body Mass Index.


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		function 
		mod(div,base)
		{

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

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		function 
		calcBmi()
		{

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

		var 
		HeightFeetInt =
		document.bmi.htf.value
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		var 
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		HeightFeetConvert 
		= 
		HeightFeetInt *
		12;

		h 
		= 
		HeightFeetConvert + 
		HeightInchesInt;

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

		var 
		rvalue =
		true;

		if
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		(w
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		(h
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		48)
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		(h
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		{

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

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		if
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		{

		if
		(HeightInchesInt
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		11)
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		reminderinches 
		= 
		mod(HeightInchesInt,12);

		document.bmi.hti.value
		= 
		reminderinches;

		document.bmi.htf.value
		= 
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		((HeightInchesInt
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		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;
		}

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		rvalue;

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		</script>

		<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>