IE9 colspan bug

IE9

table 所有列colspan≧2,显示百分比有问题。需要加一行空行

<table>

<col style="width:10%">

<col style="width:10%">

<col style="width:30%">

<col style="width:10%">

<col style="width:10%">

<col style="width:30%">

<tr>

<td style="height:0px;padding:0px;"></td>

<td style="height:0px;padding:0px;"></td>

<td style="height:0px;padding:0px;"></td>

<td style="height:0px;padding:0px;"></td>

<td style="height:0px;padding:0px;"></td>

<td style="height:0px;padding:0px;"></td>

</tr>

<tr>

<td colspan=3>A</td>

<td colspan=3>B</td>

</tr>

</table>