update_revisi.php

<?php
include "../config.php";

$kode = $_POST['kode']; //ditambahin ini aja bro
$user = $_POST['user'];
$password = $_POST['password'];
$pass = md5($password);
$jurusan = $_POST['jurusan'];
$kelas = $_POST['kelas'];
$nama = $_POST['nama'];

$sql = @mysql_query ("UPDATE tb_voter SET username = '$user',password='$pass',jurusan='$jurusan',kelas='$kelas',nama='$nama' WHERE id_voter='$kode'") or die (mysql_error());

if(!$sql){
	?>
	<script type="text/javascript">
		alert("Ubah Data Gagal");
		history.go(-1);
	</script>
	<?php
}else{
	?>
	<script type="text/javascript">
		alert("Ubah Data Berhasil");
		window.location.href="voter.php";
	</script>
	<?php
}