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<html>
<head>
<script type="text/javascript" src="http://cdn.jsdelivr.net/jquery/1/jquery.min.js"></script>
<script type="text/javascript" src="http://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script>
<link rel="stylesheet" type="text/css" href="http://cdn.jsdelivr.net/bootstrap/latest/css/bootstrap.css" />

<!-- Include Date Range Picker -->
<script type="text/javascript" src="http://cdn.jsdelivr.net/bootstrap.daterangepicker/2/daterangepicker.js"></script>
<link rel="stylesheet" type="text/css" href="http://cdn.jsdelivr.net/bootstrap.daterangepicker/2/daterangepicker.css" />

</head>
<body>
<input type="text" name="birthdate" value="" />

<script type="text/javascript">
$(function() {
    $('input[name="birthdate"]').daterangepicker({
        singleDatePicker: true,
        showDropdowns: true

    },
    function(start, end, label) {
      //  var years = moment().diff(start, 'years');
        //alert("You are " + years + " years old.");
    });
});
</script>
</body>
</html>