Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<title>Calculate BMR</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
function CalculateBMR(f)
{
var ele = f.elements;
var weight = Number(ele.text1.value);
var feet = Number(ele.text2.value);
var inch = Number(ele.text3.value);
var age = Number(ele.text4.value);
var bmr;
var sex = (ele.text5[0].checked)? "male" : "female";
if(sex=="male"){
bmr = 66+parseInt( 6.23*weight)+parseInt(12.7*(feet*12+parseInt(inch)))-parseInt( 6.8*age);
} else if (sex=="female"){
bmr = 655 + (4.35*weight)+(4.7*(feet*12+inch))-(4.7*age);
}
ele.text6.value = bmr;
return true;
}
</script>
</head>
<body>
<form action="#">
<table border="0">
<tbody>
<tr>
<td><strong style="text-decoration: underline;">Height</strong></td>
</tr>
<tr>
<td><strong>Feet</strong>
<input name="text2" size="3" type="text">
<strong>Inch</strong>
<input name="text3" size="3" type="text"></td>
</tr>
<tr>
<td><strong style="text-decoration: underline;">Weight</strong></td>
</tr>
<tr>
<td><input name="text1" size="4" type="text"><strong>lb</strong></td>
</tr>
<tr>
<td><input name="text4" size="4" type="text"><strong>age</strong></td>
</tr>
<tr>
<td>
<input type="radio" name="text5" value="male" checked> Male
<br />
<input type="radio" name="text5" value="female"> Female
<br />
</td>
</tr>
<tr>
<td colspan="2"><input onclick="return CalculateBMR(this.form)" type="button" value="Calculate"></td>
<td></td>
</tr>
<tr>
<td><strong>BMR</strong>
<input name="text6" size="5" type="text"></td>
</tr>
</tbody></table>
</form>
</body>
</html>
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