ดู Code ให้หน่อยคับผมเจอปัญหาในการลบข้อมูล ต้องการ Code ลบข้อมูลต้องทำไงคับ ข้อ Code แก้หน่อย

<link href="style.css" rel="stylesheet" type="text/css" />
<?
include("./include/config.php");
include("./include/function.inc.php");

//ตรวจสอบนามสกุล
function randomToken($len) { 
srand( date("s") ); 
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 
$chars.= "1234567890";
$ret_str = ""; 
$num = strlen($chars); 
for($i=0; $i < $len; $i++) { 
$ret_str.= $chars[rand()%$num];
} 
return $ret_str; 
} 
$code = randomToken(30);

//
$Personnel_Pictures= $_POST[Personnel_Pictures];

if(!isset($_POST[Personnel_Pictures])){ 
$Personnel_Pictures_name=$_FILES["Personnel_Pictures"]["name"]; 
if(strchr($Personnel_Pictures_name,".")==".JPG" || strchr($Personnel_Pictures_name,".")==".jpg"){ 
	$images = $_FILES["Personnel_Pictures"]["tmp_name"];

	$new_images = "$code".$_FILES["Personnel_Pictures"]["name"];
	copy($_FILES["Personnel_Pictures"]["tmp_name"],"./photo_personnel/$code".$_FILES["Personnel_Pictures"]["name"]);

	$width=200; 
	$size=GetimageSize($images);
	$height=round($width*$size[1]/$size[0]);
	$images_orig = ImageCreateFromJPEG($images);
	$photoX = ImagesX($images_orig);
	$photoY = ImagesY($images_orig);
	$images_fin = ImageCreateTrueColor($width, $height);
	ImageCopyResampled($images_fin, $images_orig, 0, 0, 0, 0, $width+1, $height+1, $photoX, $photoY);
	ImageDestroy($images_orig);
	ImageDestroy($images_fin);

$sql="DELETE FROM tb_personnel WHERE Personnel_id=$Personnel_id";
$result=mysql_query($sql);
//จัดเก็บลงฐานข้อมูล
$result=mysql_query("INSERT INTO tb_personnel (Personnel_name, Personnel_position, Personnel_Education, Personnel_responsible, Personnel_province,   Personnel_herpes, Personnel_retire, Personnel_MAIL, Pe_code, Personnel_Pictures) VALUES ('".$_POST[Personnel_name]."', '".$_POST[Personnel_position]."', '".$_POST[Personnel_Education]."', '".$_POST[Personnel_responsible]."', '".$_POST[Personnel_province]."', '".$_POST[Personnel_herpes]."', '".$_POST[Personnel_retire]."', '".$_POST[Personnel_MAIL]."', '".$_POST[Pe_code]."','$new_images')");


//('$Personnel_name', '$Personnel_position', '$Personnel_Education', '$Personnel_responsible', '$Personnel_province', '$Personnel_herpes', '$Personnel_retire', '$Personnel_MAIL', '$Pe_code')";

echo"<br><center><img src='images/loading.gif'></center>";
echo"<br><center><span class='ms_14_red_bold'>ทำการเพิ่มข้อมูลบุคลากรเรียบร้อยแล้ว</span></center>";
echo"<center><span class='ms_14_nor'>กรุณารอสักครู่   Loading....</span></center>";
?>
<meta http-equiv="refresh" content="2;URL= admin/Personnel_manage.php">
<?

} else {
echo"<br><center><span class='ms_14_red_bold'>ไม่สามารถแก้ไขข้อมูลได้</span></center>";
exit();
}
}

?>