再来100分求解,还是关于表格问题?
<table id=t width="100%" border="1" cellspacing="0" cellpadding="0">
<tr>
<td width="33%"> 00</td>
<td rowspan="2" colspan="2">01 </td>
<td rowspan="2" width="34%">02 </td>
</tr>
<tr>
<td width="33%"> 10</td>
</tr>
<tr>
<td rowspan="3" width="33%">20 </td>
<td width="14%" rowspan="2"> 21</td>
<td width="19%">22</td>
<td rowspan="3" width="34%">23</td>
</tr>
<tr>
<td width="19%">45</td>
</tr>
<tr>
<td colspan="2"> 30</td>
</tr>
<tr>
<td width="33%"> 40</td>
<td colspan="2"> 41</td>
<td width="34%"> 42</td>
</tr>
</table>
上表格中,如何知道21,22,45,30和41是一列上的