keyup.down

<!DOCTYPE HTML>
<html lang=en>
<head>
    <title>Belajar Jquery dan Ajax</title>

    <style type="text/css">
    </style>

</head>
<body>
    <input type="text" id="pusom"/>
    <span id="firdaus"></span>


     <script type="text/javascript" src="jquery.js"></script>
     <script type="text/javascript">
    $('#pusom').keydown(function(){
      var a = $('#pusom').val();
      alert(a);

     });

    </script>

</body>
<html>