gan mau tanya,gimana caranya bila nama ikan dipilih hatganya bsa muncul secara otomatis,jika jumlah yg di pesan hasil prkalian total byrnya bisa muncul otomatis ini scripnya mohon bntuannya ya gan
<html>
<head>
<title>BALAI BENIH IKAN</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="container">
<div id="header">
<br>
<marquee behavior="alternate" style="font-family: impact;font-size:30px;color:#000000;" align="top" direction="right">
<h1 align="center">BALAI BENIH IKAN</h1
></marquee>
</div>
<div id="leftbar">
<div class="menu">
<ul>
<li><a href="index.php"><b>HOME</b></a></li>
<li><a href="tips.php"><b>CARA PEMESANAN</b></a></li>
<li><a href="ikan_order.php"><b>ORDER IKAN</b></a></li>
<li><a href="order_benih.php"><b>ORDER BENIH</b></a></li>
<li><a href="HARGA_IKAN.php"><b>IKAN KONSUMSI</b></a></li>
<li><a href="HARGA_BENIH.php"><b>BENIH IKAN</b></a></li>
</ul>
</div>
</div>
<div id="contain">
<td>
<table align="center"width="100" height="50" border="10" bordercolor="#333333">
<tr>
<td align="center" width="50" height="32" class="style1"><pre><span class="style1"><h2>Nama benih</h2></span></pre></td>
<td align="center" width="50" height="32" class="style1"><pre><span class="style1"><h2>benih</h2></span></pre></td>
<td align="center" width="80" height="32" class="style1"><pre><span class="style1"><h2>Harga</h2></span></pre></td>
</tr>
<?php
mysql_connect("localhost","root","");
mysql_select_db("anton");
$query = mysql_query("SELECT * FROM `bibit` WHERE 1");
while ($row= mysql_fetch_array($query)){
$nama_benih =$row['nama_benih'];
$harga_benih =$row['harga_benih'];
$foto =$row['foto'];
?>
<tr>
<td align="center" width="150" height="35"><h3><?php echo $nama_benih; ?></h3></td>
<td align="center" width="150" height="35"><h3><?php if(isset($foto)){echo"<img src='admin/foto/$foto' width='150'>";}?></h3></td>
<td align="center" width="150" height="35"><h3><?php echo $harga_benih; ?></h3></td>
</tr>
<?php
}
?>
</table>
</div>
<div id="footer">
<p align="center">BBI Balai Benih Ikan</p>
</div>
</body>
</html>
<script type="text/javascript">
function pilih(pilihan){
var ubah = "<select name='kg'><option value='0'>Pilih</option>";
for(i=1;i<=4;i++){
harga = pilihan*i;
ubah += "<option value='"+harga+"/"+i+"Kg'>"+harga+"/"+i+"Kg</option>";
}
ubah += "</select>";
document.getElementById("kg").innerHTML = ubah;
}
</script>
Nama Benih:
<select name="benih" onchange="pilih(this.value);">
<option value="0" selected>Pilih</option>
<option value="1000" >nila</option>
<option value="2000" >gurame</option>
<option value="3000" >mas</option>
<option value="4000" >patin</option>
</select><br /><br />
Per KG:
<div id="kg"></div>
