loginController

<?php
//session_start();
class LoginController extends Controller{
    public function actionIndex(){
        // renders the view file 'protected/views/site/index.php'
        // using the default layout 'protected/views/layouts/main.php'
        //$this->render('_viewLogin');
            $model=new Login;
        $this->render('_viewLogin',array('model'=>$model));
    }
    public function actionError(){
        if($error=Yii::app()->errorHandler->error){
            if(Yii::app()->request->isAjaxRequest)
                echo $error['message'];
            else
                $this->render('error', $error);
        }
    }
    public function actionLogin(){
        $model=new Login;
        // if it is ajax validation request
        if(isset($_POST['ajax']) && $_POST['ajax']==='login-form'){
            echo CActiveForm::validate($model);
            Yii::app()->end();
        }
        // collect user input data
        if(isset($_POST['Login'])){
            $model->attributes=$_POST['Login'];
            // validate user input and redirect to the previous page if valid
            if($model->validate() && $model->login())
                //$this->redirect(Yii::app()->user->returnUrl);
                $this->render('_viewLogin',array('model'=>$model));
        }
        //print_r($model);
        $this->render('_viewLogin',array('model'=>$model));
    }
}