Jquery ile Dinamil Mysql'de Veri Silme

<?php

include("db.php");


			//SORGU STANDART BAŞLA//
			$hesapCekSTANDART	=	$db->prepare("SELECT * FROM group WHERE profilgroup='STANDART'");
				if($hesapCekSTANDART === false) { 
							die('Sorgu hatası:' . $db->error); 
						}
						
			$hesapCekSTANDART->execute();
			$hesapCekSTANDARTSonuc = $hesapCekSTANDART->get_result();
			//SORGU STANDART BİTİR//
			
					echo "<table class='update'>";
					
						while($sonucSTANDART = $hesapCekSTANDARTSonuc->fetch_object()){
							
							echo	"
									<tr>
										<td>sdas</td>
										<td>sdsds<a href='#' id='{$sonucSTANDART->username}' class='delete_button'>Sil</a></td>
									</tr>
									";
							}
							
					echo "</table>";	
?>

$(function() {
$(".delete_button").click(function() {
var id = $(this).attr("id");
var dataString = 'id='+ id ;
var parent = $(this).parent();
	
$.ajax({
   type: "POST",
   url: "islem.php",
   data: dataString,
   cache: false,

   beforeSend: function()
   {
   parent.animate({'backgroundColor':'#fb6c6c'},300).animate({ opacity: 0.35 }, "slow");;
   }, 
   success: function()
   {
   
	parent.slideUp('slow', function() {$(this).remove();});
	
  }
   
 });

return false;
	});
});

table.update
	{font-size:1.2em;
	}
	
	table.update tr td{ 
	height:50px; border-bottom:#dedede dashed 1px; background-color:#ffffff
	
	}

parent.slideUp('slow', function() {$(this).remove();});

parent.slideUp('slow', function() {$(this).parent().remove();});

parent.slideUp('slow', function() {$(this).remove();});

parent.slideUp('slow', function() {$(this).parent().remove();});

var parent = $(this).parent().parent();