public static function showLogin() {
        $container = layoutManager::generateGrid("450px");
        $panel = layoutManager::generateCard("Login");

        $form = new tag("form");
        $form->class("mdl-cell", "mdl-cell--12-col");
        $panel->child($form);
        $form->method("post");

        $action = layoutManager::generateHidden("action", "userInterface");
        $subaction = layoutManager::generateHidden("subaction", "login");
        $user = layoutManager::generateTextfield("userInterface_strName", "strName", "Username", "", 1);
        $user->class("wide");
        $password = layoutManager::generatePassword("userInterface_strPassword", "strPassword", "Password", "");
        $password->class("wide");
        $button = layoutManager::generateSubmit("Login");
        $button->class("wide");
        $form->child($action, $subaction, $user, $password, $button);

        $container->child($panel);
        html::addElement($container);
        html::printPage(1);
    }