<td class=normal onmousedown="this.classname='down'"
onmouseover="this.classname='up',high(this)" onmouseout="this.classname='normal',low(this)" style="filter:alpha(opacity=50)"onmouseup="this.classname='up'">
<div align="center">子菜单</div>
</td>
</tr>
<tr>
<td class=normal onmousedown="this.classname='down'"
onmouseover="this.classname='up',high(this)" onmouseout="this.classname='normal',low(this)" style="filter:alpha(opacity=50)"onmouseup="this.classname='up'">
<div align=center>子菜单</div>
</td>
</tr>
<tr>
<td class=normal onmousedown="this.classname='down'"
onmouseover="this.classname='up',high(this)" onmouseout="this.classname='normal',low(this)" style="filter:alpha(opacity=50)"onmouseup="this.classname='up'">
<div align=center>子菜单</div>
</td>
</tr>
<tr>
<td class=normal onmousedown="this.classname='down'"
onmouseover="this.classname='up',high(this)" onmouseout="this.classname='normal',low(this)" style="filter:alpha(opacity=50)"onmouseup="this.classname='up'">
<div align=center>子菜单</div>
</td>
</tr>
</table>
</div>