EDIT / UPDATE DATA 1. Coding edit_siswa.php <form name="form1" method="post" action="update_siswa.php"> <table width="400" border="0" align="center" cellpadding="1" cellspacing="1" bordercolor="#FFFF99" bgcolor="#FF0000"> <tr bgcolor="#FFFFCC"> <td height="50" colspan="2"><div align="center">EDIT DATA</div></td> </tr> <?php include ("koneksi.php"); $sqlTampil="select * from siswa Where nis='$_GET[nis]'"; $qryTampil=mysql_query($sqlTampil); $dataTampil=mysql_fetch_array($qryTampil); ?> <tr bgcolor="#FFFFFF"> <td height="40">Nis </td> <td>: <input name