DELETE ROW WITHOUT REFRESHING PAGE IN PHP

<tr><a href="" id="'.$row['rec_id'].'" class="delbutton"><b>Delete</b></a></tr>

<script type="text/javascript" >
        $(function() {
            $(".delbutton").click(function() {
                var del_id = $(this).attr("id");
                var info = 'id=' + del_id;
var thisTableRow = $(this).closest('tr');
                if (confirm("Sure you want to delete this post? This cannot be undone later.")) {
                    $.ajax({
                        type : "POST",
                        url : "delete_pdf.php", //URL to the delete php script
                        data : info,
                        success : function() {
alert("PDF Successfully deleted!");
 $(thisTableRow).hide("fast");
                        }
                    });
                }
                return false;
            });
        });
 </script>

delete_pdf.php

<?php
 require_once('mysql_connect.php');
$id=$_POST['id'];
$delete = "DELETE FROM uploaded_tax_files WHERE rec_id='$id'";
$result = mysql_query($delete) or die(mysql_error());

?>