One question

public static function nkfBackground() {
            $background = '';
            if(Request::post('nkf_Change_background')){
                Option::add('nkfbackground',$background);
                Notification::set('success', __('Success'));         
            }else{
                Option::update('nkfbackground',$background);
                Notification::set('success', __('Success'));
            }
            echo (
                Form::open(null, array('class' => 'form-search')).
                Form::input('background',$background,array('name' => 'background','placeholder' => '#000','type'=>'text','class' => 'input-large')).                
                Form::submit('nkf_Change_background',__('Save','nkftheme'),array('type'=>'submit','class'=>'btn')).
                Form::close()
            );
        }