public function actionPurchaseOrder()
 {
     $model = new Suppliers();
     $count_sql = "SELECT COUNT(*) FROM purchase_order";
     $total_records = Yii::app()->db->createCommand($count_sql)->queryScalar();
     if ($total_records == 0) {
         $this->beginWidget('zii.widgets.jui.CJuiDialog', array('id' => 'juiDialog', 'options' => array('title' => 'Add Suppliers', 'autoOpen' => true, 'modal' => 'true', 'show' => 'blind', 'hide' => 'explode'), 'cssFile' => Yii::app()->request->baseUrl . '/css/jquery-ui.css'));
         echo 'Please add some suppliers to raise purchase order';
         $this->endWidget();
     }
     if (isset($_POST['Suppliers'])) {
         $model->attributes = $_POST['Suppliers'];
         if ($model->validate()) {
             // form inputs are valid, do something here
             return;
         }
     }
     $this->render('purchaseOrder', array('model' => $model));
 }