tambah.php tutorial combobox_1

<script type="text/javascript">

    function call_kab () {

        var prov = $('#provinsi option:selected').val();
        //alert(prov);
        if (prov == 0) {
            alert("Pilih Provinsi");
        }else{
            // $('#kabupaten').show();
        //alert(prov);
        $.ajax({
            url:"<?php echo $this->createUrl('/Combobox/get_kab'); ?>",
            type:'POST',
            data:{ prov:prov },
            success:function(data){
                $('#kab').html(data);
            }
          })
        }
    };

    function call_kec () {

        var kab = $('#kab option:selected').val();
        //alert(kab);
        if (kab == 0) {
            alert('Input required !');
        }else{
            // $('#kecamatan').show();
        //alert(prov);
        $.ajax({
            url:"<?php echo $this->createUrl('/Combobox/get_kec'); ?>",
            type:'POST',
            data:{ kab:kab },
            success:function(data){
                $('#kec').html(data);
            }
          })
        }
     };

     function call_kel () {

        var kel = $('#kec option:selected').val();
        //alert(kab);
        if (kel == 0) {
            alert('Input required !');
        }else{
            // $('#kecamatan').show();
        //alert(prov);
        $.ajax({
            url:"<?php echo $this->createUrl('/Combobox/get_kel'); ?>",//link to url ComboboxController actionGet_Kel
            type:'POST',
            data:{ kel:kel },
            success:function(data){
                $('#des').html(data);
            }
          })
        }
     };
     </script>

<form method="post" action="<?php echo $this->createUrl('/Combobox/tambah'); ?>">


            <div class="form">
                <select name="province" id="provinsi" onchange="call_kab(this)" >

                //onchange berfungsi untuk mengeksekusi function call_kab jquery
                <option value="0">--Pilih Provinsi--</option>
                    <?php
                      $criteria = new CDbCriteria;
                     $criteria->order = 'nama ASC';
                        $prov = Provinsi::model()->findAll($criteria);
                        foreach($prov as $p)
                        {
                            echo '<option value="'.$p['id_prov'].'">'.$p['nama'].'</option>';
                        }
                    ?>
                </select>
            </div>

            <div class="form">
            <label >Kota/Kab.</label>
                <select id="kab" name="kabupaten" onchange="call_kec(this)" >
                <option value="0">--Pilih kabupaten--</option>
                </select>
            </div>

            <div class="form">
                <label>Kecamatan</label>
                <select id="kec" name="kecamatan" onchange="call_kel(this)" >
                <option value="0">--Pilih kecamatan--</option>
                </select>
            </div>

                <div class="form">
                <label>kelurahan</label>
                <select id="des" name="kelurahan">
                <option value="0">--Pilih kelurahan--</option>
                </select>
            </div>

            <div class="form">
                <label>Biaya pengiriman</label>
                <input type="text" name="harga">
                </select>
            </div>

            <div class="form">
                <input type="submit" name="addsubmit" class="btn" value="Simpan">
            </div>

            </form>