这样一个效果为什么不能实现？急盼高手解答

Question

<table>
<tr><td><select name="select" onchange="showList.style.display=(value==1?'inline':'none')">
                <option value="1" selected>Toilet seat</option>
                <option value="2">Cabinet</option>
                <option value="3">Mirror frame</option>
                <option value="4">Basin</option>
                <option value="5">Faucet</option>
                <option value="6">Shower head</option>
                <option value="7">Accessories</option>
              </select></td>
</tr>
 <tr id=showList> 
            <td align="center">产品二级类别：</td>
            <td><select name="select2">
                <option value="1" selected>Wooden toilet seat</option>
                <option value="2">MDF flat toilet seat</option>
                <option value="3">Pressed wood toilet seat</option>
                <option value="4">Polyresin toilet seat</option>
                <option value="5">Fabric decor toilet seat</option>
              </select></td>
          </tr>
</table>