How to calculate human being height in jquery?

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jQuery

Hi All,
How to calculate human being height in jquery. I have three textbox for entering the value for height in cms,inches,foot. I wrote some code for foot it is working fine. But i want to convert from inches to foot,cms and cms to inches,foot.
Below is my code

var feet = 0;
var inch = 0;
var cms = 0;
$('.feet').each(function () {
   if ($(this).val() != '' && $.isNumeric($(this).val())) {
       inch = parseFloat($(this).val() * 12);
       cms = parseFloat($(this).val() * 30.48);
   }
});
if (inch != 0 && cms != 0) {
   $("#<%=txtInches.ClientID%>").val(inch);
   $("#<%=txtCms.ClientID %>").val(cms);
}
else {
   $("#<%=txtInches.ClientID%>").val('');
   $("#<%=txtCms.ClientID %>").val(cms);
}
return false;
working above code
-----------------------------------------------------------------------------------
$('.inch').each(function () {
   if ($(this).val() != '' && $.isNumeric($(this).val())) {
       feet = parseFloat($(this).val() * 0.08);
       cms = parseFloat($(this).val() * 2.54);
       alert(parseFloat($(this).val() * 0.08));
       alert(cms);
   }
});

if (feet != 0 && cms != 0) {
   $("#<%=txtFeet.ClientID%>").val(feet);
   $("#<%=txtCms.ClientID %>").val(cms);
}
else {
   $("#<%=txtInches.ClientID%>").val('');
   $("#<%=txtCms.ClientID %>").val('');
}
return false;

Please reply me as early as possible


Thanks
Hari