<table width="300" border=1>
<tr>
<td width="100" id="left" style="">sdfsdf</td>
<td width="200" id="right">sdfsd</td>
</tr>
</table>
<input type=button onclick=document.getElementById("left").style.width='200px';document.getElementById("right").style.width='100px'>
<tr>
<td width="100" id="left" style="">sdfsdf</td>
<td width="200" id="right">sdfsd</td>
</tr>
</table>
<input type=button onclick=document.getElementById("left").style.width='200px';document.getElementById("right").style.width='100px'>
<tr>
<td id="tdleft" width="100" id="left"></td>
<td id="tdfringt" width="200" id="right"></td>
</tr>
</table>
<scprit>
window.tdleft.width=200;
window.tdright.width=100;
</scprit>
回复人:hanc(寒晨) 的方法好像有些问题;不管怎样,谢谢两位的帮助!