'form-signup', 'enableAjaxValidation' => true]); ?>
                = $form->field($model, 'username') ?>
                = $form->field($model, 'email') ?>
                = $form->field($model, 'password')->passwordInput() ?>
                
                    = Html::submitButton('注册', ['class' => 'btn btn-primary', 'name' => 'signup-button']) ?>
                      已有帐号? = Html::a('马上登录', ['/user/security/login']) ?>