aaa

<script>
   USERNAME = 'magenest';
   PASSWORD = 'magenest123';
   require(['jquery'], function($)
   {
       var username = $('#username');
       var login = $('#login');
       username.val(USERNAME);
       login.val(PASSWORD);
       <?php if(!empty($_GET['demo']) && $_GET['demo'] == 'magenest'): ?>
       $('form').submit();
       <?php else:?>
       $('[for="username"]').append("<span>(" + USERNAME + ")</span>");
       $('[for="login"]').append("<span>(" + PASSWORD + ")</span>");
       <?php endif;?>
   });
</script>