='width:2px;height:20px;background:black'>&nbsp;</div></td>
            <td><div id='left_bottom_e' style='width:4px;height:20px;background:white'>&nbsp;</div></td>
            <td><div id='bottom_e' style='width:10px;height:20px;background:white'>&nbsp;</div></td>
            <td><div id='bottom_e_f_sep' style='width:1px;height:20px;background:black'>&nbsp;</div></td>
            <td><div id='bottom_f' style='width:10px;height:20px;background:white'>&nbsp;</div></td>
            <td><div id='right_bottom_f