errorupdate

<?php

    include "koneksi.php";
    if (isset($_GET['edit_id'])) {
        $sql3 = "select * from daftar where id_reg=" .$_GET['edit_id'];
        $result = mysqli_query($connect, $sql3);
        $row = mysqli_fetch_array($result);

    }


        if (isset($_POST['update'])) {
            $nama_reg = $_POST['nama_reg'];
            $no_telp = $_POST['no_telp'];
            $alamat = $_POST['alamat'];
            $jenis_kel = $_POST['jenis_kel'];
            $agama = $_POST['agama'];
            $email = $_POST['email'];
            $username = $_POST['username'];
            $password = $_POST['password'];

        $edit = "update daftar set nama_reg='$nama_reg', no_telp='$no_telp', alamat='$alamat', email='$email', username='$username', password='$password' where id_reg=".$_GET['update'];
        $result = mysqli_query($connect,$edit);
        if (!isset($sql3)) {
                die("error $sql3" .mysqli_connect_error());
            }else{
                header("location:data.php");
            }
        }

 ?>
<h4 align="right"><a href="data.php">Lihat Data</a></h4>
<center><h1>Form Edit</h1></center>


 <form method="post" action="">
    <table align="center" cellpadding="3" cellspacing="0" width="600">

    <tr>
        <td>Nama</td><td>:</td><td><input type="text" name="nama_reg" size="40" value="<?=$row['nama_reg'];?>"></td>
    </tr>
    <tr>
        <td>No. Telp</td><td>:</td><td><input type="text" name="no_telp" size="40" value="<?=$row['no_telp'];?>"></td>
    </tr>
    <tr>
        <td>Alamat</td><td>:</a></td><td><textarea name="alamat" cols="42" rows="7"><?=$row['alamat'];?></textarea></td>
    </tr>
    <tr>
        <td>Jenis Kelamin</td><td>:</td><td><input type="radio" value="Laki-laki" name="jenis_kel">Laki-laki
                                            <input type="radio" value="Perempuan" name="jenis_kel">Perempuan</td>
    </tr>
    <tr>
        <td>Agama</td><td>:</td><td><select name="agama">
                                        <option value="">--Pilih--</option>
                                        <option value="Islam">Islam</option>
                                        <option value="Budha">Budha</option>
                                        <option value="Hindu">Hindu</option>
                                        <option value="Khatolik">Katholik</option>
                                        <option value="Kristen">Kristen</option>
                                    </select></td>
    </tr>
    <tr>
        <td>E-mail</td><td>:</td><td><input type="text" name="email" size="40" value="<?=$row['email'];?>"></td>
    </tr>
    <tr>
        <td>Username</td><td>:</td><td><input type="text" name="username" size="40" value="<?=$row['username'];?>"></td>
    </tr>
    <tr>
        <td>Password</td><td>:</td><td><input type="password" name="password" size="40" value="<?=$row['password'];?>"></td>
        <td></td><td></td><td><input type="hidden" name="id_reg" value="<?=$row['id_reg'];?>"></td>
    </tr>
    <tr>
        <td colspan="3" align="center">
        <button type="submit" name="update" id="update" onclick="update()">Update</button>
            <a href="data.php"><button type="reset" name="Cancel" id="cancel">Cancel</button></a>
        </td>
    </tr>

    </table>


</form>
<script type="text/javascript">

function Update(){
    var x;
    if (confirm("Update data berhasil") == true) {
        x="update";
    }
}
</script>