<table id="cartTable">
<thead>
<tr>
<th><label><input class="check-all check" type="checkbox"/> 全选</label></th>
<th></th><th></th><th></th><th></th><th></th>
</tr>
</thead>
<tbody>
<td class="checkbox"></td>
<td class="goods"></td>
<td class="price"></td>
<td class="count"></td>
<td class="subtotal"></td>
<td class="operation"></td>
</tbody>
</table>
<table id="cartTable">
<thead>
<tr>
<th><label><input class="check-all check" type="checkbox"/> 全选</label></th>
<th></th><th></th><th></th><th></th><th></th>
</tr>
</thead>
<tbody>
<td class="checkbox"></td>
<td class="goods"></td>
<td class="price"></td>
<td class="count"></td>
<td class="subtotal"></td>
<td class="operation"></td>
</tbody>
</table>
getElementsTagName('table')[0]。可取到第一个table,第二个则getElementsTagName('table')[1].
代理事件则同样道理获取到td的父元素就行了