title: Calculate age based on date of birth for dd/mm/yyyy date format
body: <p>I want to calculate the age based on the date of birth. I can do it easily for date format mm/dd/yyyy but when I try to do the same for dd/mm/yyyy I got age = NaN. Here is my code logic: </p>
  
  <pre><code>$('#DateOfBirth').datepicker({
          onSelect: function (value, ui) {
              var today = new Date(),
                  dob = new Date(value),
  
                  age = today.getFullYear() - dob.getFullYear(); //This is the update
              $('#age').val(age);
              alert(age);
          },
          //maxDate: "-16Y",
          maxDate: maxDateVal,
          showOn: "both",
          buttonImage: "",
          dateFormat: "dd/mm/yy",
          changeMonth: true,
          changeYear: true,
          yearRange: '1920:c'
  
      }).keydown(function (e) {
          if (e.keyCode == 8 || e.keyCode == 46) {
              $(e.target).val("");
          } else {
              e.preventDefault();
              return false;
          }
      });
  </code></pre>