Почему не работает кнопка Логин?

{login}

[not-group=5]
<div style="display: none" id="loginbox" class="logged">
    <div class="signbox clrfix">
        <a class="lcol avatar" href="{profile-link}"><img src="{foto}" title="{login}" alt="{login}" /></a>
        <div class="rcol">
            <h3>{login}</h3>
            <ul>
                [admin-link]
                <li><a href="{admin-link}" target="_blank"><b>Админпанель</b></a></li>
                [/admin-link]
                <li><a href="{addnews-link}">Добавить пост</a></li>
                <li><a href="{pm-link}">Сообщения: ({new-pm})</a></li>
                <li><a href="{profile-link}">Мой профиль</a></li>
                <li><a href="{favorites-link}">Мои закладки ({favorite-count})</a></li>
                <li><a href="{stats-link}">Статистика</a></li>
                <li><a href="{newposts-link}">Непрочитанное</a></li>
                <li><a href="/?do=lastcomments">Последние комментарии</a></li>
                <li class="lg-out"><a href="{logout-link}" title="Выйти">Выйти</a></li>
            </ul>
        </div>
    </div>
</div>
[/not-group]
[group=5]
<div style="display: none" id="loginbox" class="not-logged">
    <form method="post" action="">
        <ul>
            <li><label for="login_name">Логин:</label>
            <input class="f_input" type="text" name="login_name" id="login_name" /></li>
            <li><label for="login_password">Пароль (<a href="{lostpassword-link}">Забыли?</a>):</label>
            <input class="f_input" type="password" name="login_password" id="login_password" /></li>
            <li class="lfield lfchek"><input type="checkbox" name="login_not_save" id="login_not_save" value="1"/>
            <label for="login_not_save">&nbsp;Чужой компьютер</label></li>
            <li class="lfield lfchek">
                <div class="sociallogin">
    [vk]<a href="{vk_url}" target="_blank"><img src="{THEME}/images/social/vkontakte.gif" /></a>[/vk]
    [odnoklassniki]<a href="{odnoklassniki_url}" target="_blank"><img src="{THEME}/images/social/odnoklassniki.gif" /></a>[/odnoklassniki]
    [facebook]<a href="{facebook_url}" target="_blank"><img src="{THEME}/images/social/facebook.gif" /></a>[/facebook]
    [mailru]<a href="{mailru_url}" target="_blank"><img src="{THEME}/images/social/mailru.gif" /></a>[/mailru]
    [yandex]<a href="{yandex_url}" target="_blank"><img src="{THEME}/images/social/yandex.gif" /></a>[/yandex]
    [google]<a href="{google_url}" target="_blank"><img src="{THEME}/images/social/google.gif" /></a>[/google]
                </div>
            </li>
        </ul>
        <div class="submitline">
            <a class="rcol" href="{registration-link}" title="Регистрация">Регистрация</a>
            <button onclick="submit();" type="submit" title="Вход"><b>Войти</b></button>
        </div>
        <input name="login" type="hidden" id="login" value="submit" />
    </form>
</div>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    [not-page-count=1]<div style="display:none;"><a href="http://web-professor.net/warez-shablony-dle/">http://web-professor.net/warez-shablony-dle</a></div>[/not-page-count]
[/group]