/**
 * Deletes a particular model.
 * If deletion is successful, the browser will be redirected to the 'admin' page.
 * @param integer $id the ID of the model to be deleted
 */
public function actionDelete($id)
{
    $this->loadModel($id)->delete();

    // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
    if (!isset($_GET['ajax'])) {
        $this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
    }
}