<td> [removed][removed] [removed] $(document).ready(function() { $(".propinsi").change(function() { var id=$(this).val(); $.ajax ({ type: "POST", url: "<?php echo base_url();?>index.php/main/sel_kota/", data: id, cache: false, success: function(html) { $(".kota_user").html(html); } }); }); }); [removed] <h1><center>Registrasi</center></h1> <form name="form1" method="post" action="<?php echo $_SERVER['PHP_SELF'];?>"> <table align="center"> <tr><td>Nama : </td><td><input type="text" id="nama" name="nama" value="<?php echo $_SESSION['names']; ?>"></td></tr> <tr><td>Password : </td><td><input type="password" id="pass" name="pass" value="<?php echo $_SESSION['password']; ?>"></td></tr> <tr><td>Konfirmasi Password : </td><td><input type="password" id="kpass" name="kpass" value="<?php echo $_SESSION['confirm_pass']; ?>"></td></tr> <tr><td>Propinsi</td><td> <select name="propinsi" class="propinsi"> <?php foreach($prop as $kue) { ?> <option value="<?php echo $kue->Propinsi; ?>"><?php echo $kue->Propinsi; ?></option> <?php } ?> </select> </td></tr> <tr><td>Kota</td><td> <select name="kota_user" class="kota_user"> <option selected="selected">--Select City--</option> </select> </td></tr>