makzz,
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>datepicker demo</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
</head>
<body>
<div id="datepicker"></div><script>
$("#datepicker").datepicker({
dateFormat: "d/m/yy",
onSelect: function(dateText, inst) {
var data = dateText.split('/');
alert('novosti_po_date/day-'+data[0]+'/mouth-'+data[1]+'/year-'+data[2]) }
});
</script>
</body>
</html>