d:white'>&nbsp;</div></td>
            <td><div id='e_f_sep' style='width:1px;height:30px;background:black'>&nbsp;</div></td>
            <td><div id='top_f' style='width:10px;height:30px;background:white'>&nbsp;</div></td>
            <td colspan=3><div id='f_sharp' style='width:10px;height:30px;background:black'>&nbsp;</div></td>
            <td><div id='top_g' style='width:10px;height:30px;background:white'>&nbsp;</div></td>
            <td colspan=3><div id='g_sharp' style='width:10px;height:30px;backgr