Jquery Datepicker with Age count function

<script type="text/javascript" src="js/jquery-1.7.2.js"></script>

<script type="text/javascript" src="js/jquery.ui.datepicker.js"></script>

<link rel="stylesheet" type="text/css" href="css/ui-lightness/jquery-ui-1.8.23.custom.css" />

<script type="text/javascript" src="js/jquery-ui-1.8.23.custom.min.js"></script>

<script type="text/javascript">

function cal_age() {

var bday=(document.getElementById("dateofbirth").value);

 

var spl =  bday.split("/");

var bdate = spl[0];

var bmonth = spl[1];

var byear = parseInt(spl[2]);

//alert(byear);

//var bmo=(parseInt(document.getElementById("selMonths").value)-1);

//var byr=parseInt(document.getElementById("selYears").value);

var age;

var now = new Date();

tmo=(now.getMonth());

tday=(now.getDate());

//alert(tday);

var tyr=parseInt(now.getFullYear());

{

if(tyr > byear)

{age=byear}

  else

{age=byear}

document.getElementById("txtApAge").value=(tyr-age);

}

}

</script>

<script type="text/javascript">

$(document).ready(function(){

// $("#dateofbirth").datepicker({ 

 //  dateFormat: 'yy-mm-dd',

//   showAnim: 'slideDown',

// changeMonth: true,

// yearRange: '1950:2012',

// changeYear: true }); 

 $('#dateofbirth').datepicker({

changeMonth: true,

showAnim: 'slideDown',

changeYear: true,

maxDate:0,

dateFormat: 'dd/mm/yy',

      yearRange: '1950:+0'});

});

</script>

<style type="text/css"> 

      .ui-datepicker

       {

           font-size: 8pt;

           font-family: Verdana;

       }       

</style>

  <table>

      <tr id="trOdd">

<td width="15%">

<b>Date of Birth :</b><font size="2" color="#FF0000"> </font>

</td>

<td>

 <input type="text" size="20" name="dateofbirth" id="dateofbirth" readonly="readonly" onchange="cal_age();" maxlength="100" ></input>

</td>

<td width="29%"><B>AGE :</B><font size="2" color="#FF0000"> </font>

<input type="text" name="txtApAge" id="txtApAge" size="5" maxlength="4" readonly />&nbsp;&nbsp;<b></b>

  </td>

</tr>

</table>

<a href="http://jqueryui.com/datepicker/" target="_blank">download datepicker Widgets</a>