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Grep callback

< html>   <head>     <script type="text/javascript" src="js/jquery-1.3.2.js"></script>     <script type="text/javascript">         $(document).ready(function(){               var arr = [ 1, 3, 5,  7 ,5 ,6 ,7,9];               arr = jQuery.grep(arr, function(n, i){                   return (n != 5 && i > 4);               });               alert(arr.join(", "));                                     });     </script>   </head>   <body>     <body>         <p></p>     </body> </html>