delete-data-tabel-with-alert-confirm

<?php
include "koneksi.php";
$hapus_data = mysql_query("delete from tamu where id_bukutamu = '$_GET[id]'",$koneksi);
if($hapus_data){
?>
<script language="javascript">
alert('Yakin lo mau di hapus, ga nyesel kan');
document.location="lihat.php";
</script>
<?php
}else{
?>
<script language="javascript">
alert('Gagal Menghapus Pesan Karena Gangguan Mental');
document.location="lihat.php";
</script>
<?php
}
?>