请问如何取到表格中任意单元格中的内容？谢谢！！

如题：我怎么才能将表格中的"AAAA"或"BBBB"之类的能容取道JavaScript的string里？谢谢！！

 1<table>
 2<tr>
 3<td>AAAA</td>
 4<td>BBBB</td>
 5</tr>
 6<tr>
 7<td>CCCC</td>
 8<td>DDDD</td>
 9</tr>
10</table>

---------------------------------------------------------------

 1<table id="table1">
 2<tr>
 3<td>AAAA</td>
 4<td>BBBB</td>
 5</tr>
 6<tr>
 7<td>CCCC</td>
 8<td>DDDD</td>
 9</tr>
10</table>

var AAAA==window.table1.rows.item(0).cells.item(0).innerText;
var BBBB==window.table1.rows.item(0).cells.item(1).innerText
var CCCC==window.table1.rows.item(1).cells.item(0).innerText
var DDDD==window.table1.rows.item(1).cells.item(1).innerText
---------------------------------------------------------------

var AAAA=window.table1.rows.item(0).cells.item(0).innerText;
var BBBB=window.table1.rows.item(0).cells.item(1).innerText;
var CCCC=window.table1.rows.item(1).cells.item(0).innerText;
var DDDD=window.table1.rows.item(1).cells.item(1).innerText;

---------------------------------------------------------------

.children[i].cells[j].innerText

第i行第j列的文字（i、j从0计数）
---------------------------------------------------------------

1<table>
2<tr><td><form name="bbb"></form></td></tr>
3<tr><td>11</td><td>12</td><td>13</td><td>14</td><td>15</td></tr>
4<tr><td>21</td><td>22</td><td>23</td><td>24</td><td>25</td></tr>
5<tr><td>31</td><td>32</td><td>33</td><td>34</td><td>35</td></tr>
6<tr><td>41</td><td>42</td><td>43</td><td>44</td><td>45</td></tr>
7<tr><td></td></tr>
8</table>

1<script>   
2alert(document.bbb.children[2].cells[3].innerText);   
3  
4</script>