function forumchat_postbit(&$post){

    global $lang;

    if($post['chat_nickname'] == ''){
        $lang->load('forumchat');
        $post['chat_nickname'] = $lang->forumchat_nickname_error;
    } else {
        $lang->load('forumchat');
        $post['chat_nickname'] = htmlspecialchars_uni($post['chat_nickname']);
    }
}