<table id="aaa">
<tr><td>aaa</td></tr>
<tr><td>addddaa</td></tr>
</table>
<script>
alert(aaa.rows[1].cells[0].innerText);
</script>
<tr><td>aaa</td></tr>
<tr><td>addddaa</td></tr>
</table>
<script>
alert(aaa.rows[1].cells[0].innerText);
</script>
<tr >
<td onclick="alert(document.all.a.children(0).children(0).children(0).innerHTML)" value="get children(1)">
行2列1
</td>
<td onclick="alert(document.all.a.children(0).children(0).children(1).innerHTML)" value="get children(1)">
行2列2
</td>
</tr>
</table>