silakan coba

<?php include('header.php'); ?>
<?php include('leftbar.php'); ?>
<?php include('proses.php'); ?>

<div id="content">
<form method="post" enctype="multipart/form-data" action="proses.php">
    <fieldset>
        <legend>Registrasi Siswa </legend>
        <div class='caption radiustopleft'>Nis</div>
        <div class='control radiustopright'>
            <input name="nis" type="text" placeholder="Ketikkan Nis" class="fullwidthcontrol">
        </div>
        <div class='caption radiustopleft'>Nama</div>
        <div class='control radiustopright'>
            <input name="user" type="text" placeholder="Ketikkan Nama" class="fullwidthcontrol">
        </div>

        <div class='caption'>Password</div>
        <div class='control'>
            <input name="password" type="password" placeholder="Password Minimal 6 Karakter" class="fullwidthcontrol">
        </div>
        <div class='caption'>Tempat Lahir</div>
        <div class='control'>
            <input name="tmp_lahir" type="text" placeholder="Ketikkan Tampat Lahir" class="fullwidthcontrol">
        </div>

        <div class='caption'>Tanggal Lahir</div>
    <div class='control'>
      <label>
            <input name="tgl_lahir" type="text" size="10" />
            <a href="javascript:void(0)" onclick="if(self.gfPop)gfPop.fPopCalendar(document.input.tgl_lahir);return false;" ><img src="calender/calender.jpeg" alt="" name="popcal" width="34" height="29" border="0" align="absmiddle" id="popcal" style="border:none" /></a></label>
            <label></label>
            <label></label>
            <label></label>
    </div>

        <div class='caption'>Jenis Kelamin</div>
        <div class='control'>
            <input type="radio"  name="jenis_kelamin" value="Laki-laki" checked>
            <label for="jenis_kelamin">Laki-laki</label>
            <input type="radio" name="jenis_kelamin" value="Perempuan">
            <label for="jenis_kelamin">Perempuan</label>
        </div>

        <div class='caption'>Alamat</div>
        <div class='control'>
            <input name="alamat" type="text" placeholder="Ketikkan Alamat" class="fullwidthcontrol">
        </div>

        <div class='caption'>Agama</div>
        <div class='control'>
            <input name="agama" type="text" placeholder="Ketikkan Agama" class="fullwidthcontrol">
        </div>

        <div class='caption'>Jurusan</div>
        <div class='control'>
            <input name="jurusan" type="text" placeholder="Ketikkan Jurusan" class="fullwidthcontrol">
        </div>

        <div class='caption radiusbottomleft lastrow'>Foto</div>
        <div class='control radiusbottomleft radiusbottomright lastrow'>
            <div class="upload">
                <span class="capfile">upload</span>
                <input name="foto" type="file">
            </div>
        </div>
    </fieldset>

    <fieldset>
        <legend></legend>
        <div class='caption radiustopleft'></div>
  </fieldset>
    <input name="submit" type="submit" value="Kirim" class="tombol">
    <input name="submit" type="reset" value="Reset" class="tombol" style="margin-right:10px;">
</form>
</div>
<?php include('rightbar.php'); ?>
<?php include('footer.php'); ?>



proses.php

<? //memangil koneksi database
    include("koneksi_db.php");

    //menerima data kiriman dari form
    $stat = $_REQUEST[stat] ; // TIDAK ADA STAT di form atas!!
    $nis = $_REQUEST[nis];
    $user = $_REQUEST[user] ;
    $password = $_REQUEST[password] ;
    $tmp_lahir = $_REQUEST[tmp_lahir] ;
    $tgl_lahir = $_REQUEST[tgl_lahir] ;
    $jenis_kelamin = $_REQUEST[jenis_kelamin] ;
    $alamat = $_REQUEST[alamat] ;
    $agama = $_REQUEST[agama] ;
    $jurusan = $_REQUEST[jurusan] ;
    $foto = $_REQUEST[foto] ;



 //jika belum di klik input data
  $sts = $stat  ;
if ($sts == "" or $sts == 0 )
{
?>
  <? }
elseif ($stat==1)
{  echo "</p><br><br><br><br>$id_nasabah";
    $msg=" !!!";

 $queryx="INSERT INTO registrasi (nis, user, password, tmp_lahir, tgl_lahir, jenis_kelamin, alamat, agama, jurusan, foto)
            values('$nis','$user','$password','$tmp_lahir',
            $tgl_lahir','$jenis_kelamin','$alamat','$agama','$jurusan','$foto')";
  $cursor = mysql_query($queryx) ;
  if(!$cursor)
  {
     die(mysql_error() )

  }else{
  //================================tampilkan data

  }

}else{
   die('error ?');

}
   ?>