title: Getting age automatically when given Date of Birth
body: <p>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 age without giving submit. Please help me in finding a solution for this.</p>
  
  <pre><code>&lt;html&gt;
      &lt;head&gt;
          &lt;title&gt;
              DOB calculations
          &lt;/title&gt;
          &lt;link rel='stylesheet' type='text/css' href='jquery-ui.css' /&gt;
          &lt;script type='text/javascript' src='jquery.min.js'&gt;
          &lt;/script&gt;
          &lt;script type='text/javascript' src='jquery-ui.min.js'&gt;
          &lt;/script&gt;
          &lt;script type='text/javascript' src='jquery.js'&gt;
          &lt;/script&gt;
          &lt;script type='text/javascript' src='jquery-ui-custom.js'&gt;
          &lt;/script&gt;
          &lt;script type='text/javascript' src='jquery.ui.datepicker.js'&gt;
          &lt;/script&gt;
          &lt;script type="text/javascript"&gt;
              $(function() {
  
                  $('#datepicker').datepicker({
                      changeMonth: true,
                      changeYear: true,
                      dateFormat: 'mm/dd/yy',
                      //firstDay: 1,
                      onSelect: function(dateText, inst) {
                          dateText.split('/');
                          Bdate = new Date(dateText[2], dateText[0] - 1, dateText[1]);
                          BDateArr = ('' + Bdate).split(' ');
                          //document.getElementById('DOW').value = BDateArr[0]; 
                          Cdate = new Date;
                          CDateArr = ('' + Cdate).split(" ");
                          Age = CDateArr[3] - BDateArr[3];
                          document.getElementById('AGE').value = Age;
                          // DOBcalc(dateText); 
                          //DOBcalc(); 
                      }
                  })
  
              });
          &lt;/script&gt;
      &lt;/head&gt;
  
      &lt;body&gt;
          &lt;form&gt;
              DOB (mm/dd/yyyy):
              &lt;input type="text" id="datepicker" value=''&gt;
              Age:
              &lt;input id="AGE" type="text" value=""&gt;
          &lt;/form&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>