form

<form method="post" action="simpan_jual_barang.php" method="post" >
<table>
<?php
include ("../config/koneksi.php");
$sql=mysql_query("SELECT * FROM  `tabel_penjualan` ORDER BY id_penjualan DESC LIMIT 1") or die('Error, query failed. ' . mysql_error());
$ada=mysql_fetch_array($sql);
$kode=$ada['id_penjualan'];
?>
<input type="hidden" name="kode" value="<?php echo $kode  ?>" >
<div id="inputa">
<p>Kode Barang</p>
<input type='text' name="kode_barang" id="input3" size="35"  readonly class="input">
<a onclick="PopupCenter('data_barang.php', 'myPop1',800,500);" href="javascript:void(0);" class="inputlink">Cari </a>
</div>

<div id="inputa" >
<p>Nama Barang</p>
<input type="text" name="nama" id="judul1" readonly size="40"  class="input">
</div>

<div id="inputa" >
<p>Stock Tersedia</p>
<input type="text" name="stock" id="stock1" readonly size="40"  class="input" readonly>
</div>

<div id="inputa">
<p> Jumlah: </p>
<input type="text" name="jumlah" id="jumlah" class="b2" onkeyup="hitung2();"  required=""  size="40" onkeypress="return isNumberKey(event)" required="" >
</div>

<div id="inputa">
<p> Harga </p>
<input type="text" name="harga" id="harga" class="a2" onkeyup="hitung2();" required="" size="40" onkeypress="return isNumberKey(event)" required="" >
</div>

<div id="inputa">
<p> Total: </p>
<input type="text" name="total" id="total" class="c2" readonly size="40">
</div>
</div>
</table>
<input type="submit" name="submit" id="submit" Value="Submit">
</form>