Getting Age Automatically When Given Date Of Birth

I wanted to get the age of a person from his date of birth. I have a HTML code where I'm using a datepicker for dob, when I give the date-of-birth it show automatically show the ag

Solution 1:

You can try using this function as your onSelect event handler instead:

$('#dob').datepicker({
    onSelect: function(value, ui) {
        var today = newDate(),
            dob = newDate(value),
            age = newDate(today - dob).getFullYear() - 1970;

        $('#age').text(age);
    },
    maxDate: '+0d',
    yearRange: '1920:2010',
    changeMonth: true,
    changeYear: true
});

This should be very accurate (and much better than my old code), since everything's been handed off to the native Date object.

See a simple demonstration of this here: http://www.jsfiddle.net/yijiang/PHvYK/1

Solution 2:

functiongetAge(birth) {
   var today = newDate();
   var curr_date = today.getDate();
   var curr_month = today.getMonth() + 1;
   var curr_year = today.getFullYear();

   var pieces = birth.split('/');
   var birth_date = pieces[0];
   var birth_month = pieces[1];
   var birth_year = pieces[2];

   if (curr_month == birth_month && curr_date >= birth_date) returnparseInt(curr_year-birth_year);
   if (curr_month == birth_month && curr_date < birth_date) returnparseInt(curr_year-birth_year-1);
   if (curr_month > birth_month) returnparseInt(curr_year-birth_year);
   if (curr_month < birth_month) returnparseInt(curr_year-birth_year-1);
}

var age = getAge('18/01/2011');
alert(age);

Solution 3:

If you subtract two Date objects in javascript, you get their difference in milliseconds so ( BDate - (new Date()) )/365.25/24/60/60/1000 will give you an age result that should be accurate to within a day. (i.e. if their birthday is today and its a leap year it may be inaccurate)

Solution 4:

<scripttype="text/javascript">
        $(function() {
            $('#dtp').datepicker({
                changeMonth: true,
                changeYear: true,
                dateFormat: 'mm/dd/yy',
                //firstDay: 1,onSelect: function(dateText, inst) {
                    var d = newDate(Date.parse(inst.lastVal));
                    var diff = (newDate()).getFullYear() - d.getFullYear();
                    document.getElementById('AGE').value = diff;
                }
            });
        });
    </script>

Solution 5:

Try This Code very simple

functionagefinding()
    {
        var birthDay = document.getElementById("TxtDOB").value;
        varDOB = newDate(birthDay);
        var today = newDate();
        var age = today.getTime() - DOB.getTime();
        age = Math.floor(age / (1000 * 60 * 60 * 24 * 365.25));
       // alert(age);return age;
    }

this is very simple to find the age using javascript