Find out how many years old someone is using jQuery

fiddle.html

Day: <input type="text" name="day" id="day" value ="5" />
<hr>
Month: <input type="text" name="month" id="month" value ="12" />
<hr>
Year: <input type="text" name="year" id="year" value ="1972" />
<hr>
Birthday: <span id="birthday">?</span>
<hr>
Today: <span id="todayIs">?</span>
<hr>
Years Old: <span id="yearsOld">?</span>
<hr>
<button id="submitForm">Calculate Age</button>

fiddle.js

function checkAge() {
    var d = $('#day').val();
    var m = ($('#month').val() -1);
    var y = $('#year').val(); 
    var birthdate = new Date(y,m,d);
    $('#birthday').html(birthdate.toString());
    var today = new Date();
    $('#todayIs').html(today.toString());
    var diff = (today - birthdate);
    var years = Math.floor(diff/(1000*60*60*24*365));
    $('#yearsOld').html(years);
}
    
$(document).ready(function() {
    $('#submitForm').click(checkAge);
});

fiddle.manifest

name: Check How Many Years Old using jQuery
description: As a fiddle on jsFiddle: http://jsfiddle.net/gh/gist/jquery/1.6.2/1187894/?