tton_top_of_page" data-shortcut="0"></button>
            <button type="button" class="button_first_chunk" data-shortcut="1"></button>
            <button type="button" class="button_prev_file" data-shortcut="["></button>
            <button type="button" class="button_next_file" data-shortcut="]"></button>
            <button type="button" class="button_to_index" data-shortcut="u"></button>
            <button type="button" class="button_show_hide_help" data-shortcut="?"></button>
        </aside>
    </di