怎么可以让多行同时隐藏?
<table width="300" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>a</td>
<td>b</td>
</tr>
<tr>
<td>c</td>
<td>d</td>
</tr>
<div id="tt" style="display:none">
<tr>
<td>e</td>
<td>f</td>
</tr>
<tr>
<td>g</td>
<td>h</td>
</tr>
<tr>
<td>i</td>
<td>j</td>
</tr>
</div>
<tr>
<td>k</td>
<td>l</td>
</tr>
</table>
上面的不行。