Dependent Bootstrap Dropdownlist Ajax Problem

my form


<style type="text/css">

      .alert{ width: 500px;}

      #hide{ visibility: hidden;}

</style>

<?php $form=$this->beginWidget('bootstrap.widgets.TbActiveForm',array(

	'id'=>'cash-advance-form',

	'enableAjaxValidation'=>false,

)); ?>

        <?php 

            $this->widget('bootstrap.widgets.TbLabel', array(

                   'type'=>'info', // 'success', 'warning', 'important', 'info' or 'inverse'

                   'label'=>'Fields with * are required',

                   'htmlOptions'=>array('style'=>'padding:5px;')

               ));

        ?>

        <br/><br/>

        <?php $user = Yii::app()->user->name ;?>

	<?php echo $form->errorSummary($model); ?>

        

        <?php

        echo ($model->isNewRecord ? 

                $form->textFieldRow($model,'id',array('class'=>'span5','maxlength'=>32,'value'=> OpexCashAdvance::model()->getCAID(),'readonly'=>'readonly',))

                :

                $form->textFieldRow($model,'id',array('class'=>'span5','maxlength'=>32,'readonly'=>'readonly',))

                );

        ?>      

	<?php echo $form->textFieldRow($model,'amount',array('class'=>'span2','style'=>'text-align:right;font-size:16px','maxlength'=>12,'append'=>'.00','value'=>'0')); ?>

        <?php echo $form->labelEx($model,'department'); ?>

        <?php 

                echo $form->dropDownList($model,'department',

                CHtml::listData(OpexDepartment::model()->findAll(),'department_id','department_name'),

                    array('class'=>'span5','maxlength'=>12,),

                    array('ajax'=>

                            array(

                                        'type'=>'POST', //request type

                                        'url'=>CController::createUrl('OpexCashAdvance/loadcategory'), //url to call.

                                        //Style: CController::createUrl('currentController/methodToCall')

                                        'update'=>'#OpexCashAdvance_category', //selector to update

                                        //'data'=>'js:javascript statement' 

                                        //leave out the data key to pass all form values through

                                  )

                        )

             ); 

 

//empty since it will be filled by the other dropdown

#echo CHtml::dropDownList('city_id','', array());

            ?>

	<?php echo $form->labelEx($model,'category'); ?>

        <?php echo $form->dropDownList($model,'category', /*CHtml::listData(OpexCategory::model()->findAll(array('condition'=>'department_id="'.$model->department.'"')),'category_id','category_name'),*/array(/*'empty'=>'-Select-','class'=>'span5','maxlength'=>12*/)); ?>


	<?php echo $form->labelEx($model,'userid'); ?>

        <?php echo $form->dropDownList($model,'userid',CHtml::listData(Users::model()->findAll(),'userid','userRealName'), array('empty'=>'-Select-','class'=>'span5','maxlength'=>12)); ?>

        

        <?php echo $form->labelEx($model,'branch'); ?>

        <?php echo $form->dropDownList($model,'branch', CHtml::listData(Branches::model()->findAll(/*array('condition'=>'department_id="'.$model->department.'"')*/),'branch_id','branch_name'),array('empty'=>'-Select-','class'=>'span5','maxlength'=>32)); ?>

        <?php #echo $form->textFieldRow($model,'date_created',array('class'=>'span5','maxlength'=>12,'value'=>date('Y-m-d'),'readonly'=>'readonly')); ?>

        <?php 

        

        echo $form->labelEx($model,'date_created'); 

        $this->widget('zii.widgets.jui.CJuiDatePicker', array('model'=>$model,'attribute'=>'date_created','value'=>$model->date_created,'htmlOptions'=>array('maxlength'=>'11','class'=>'span-5'),'options'=>array(

                                                                                               'showAnim'=>'fadeIn',

                                                                                               'showButtonPanel'=>true,

                                                                                               'dateFormat'=>'yy-mm-dd',

                                                                                            

                                                                                               ),

                                                       )); 

        ?>

	<?php echo $form->textFieldRow($model,'desc',array('class'=>'span6','maxlength'=>100,'style'=>'resize:none;')); ?>


        <?php echo $form->textFieldRow($model,'porpose',array('class'=>'span6','maxlength'=>60,'style'=>'resize:none;')); ?>

        

        

        <div style="width: 380px; text-align: right">

                <?php $this->widget('bootstrap.widgets.TbButton', array(

                        'buttonType'=>'reset',

                        'type'=>'info',

                        'label'=>'Clear',

                )); ?>

                <?php $this->widget('bootstrap.widgets.TbButton', array(

                        'buttonType'=>'submit',

                        'type'=>'primary',

                        'label'=>$model->isNewRecord ? 'Create' : 'Save',

                )); ?>

        </div>

      

<?php $this->endWidget(); ?>

my controller function




 public function actionLoadcategory(){

            

                $data = OpexCategory::model()->findAll(

                            array('condition'=>"department_id='".$_POST['department']."'")

                        );

                echo "asdasdasdasdasdasd";

                $data=CHtml::listData($data,'category_id','category_name');

                foreach($data as $value=>$name)

                {

                    echo CHtml::tag('option',

                               array('value'=>$value),CHtml::encode($name),true);

                }

        }



i dont know why my ajax is not updating dropdownlist category any one can hep me plese, or to help me find the bug thanks in advance.

Reinhard navarro [Nhexia]

debug it with firebug and see wat error you get

also use ‘#’.CHtml::activeId($model,‘category’) in ajax update attribute instead ‘#OpexCashAdvance_category





  'update'=>'#'.CHtml::activeId($model,'category'),