<table id=mytable>
<tr><td>11</td><td>12</td><td>13</td></tr>
<tr><td>21</td><td>22</td><td>23</td></tr>
</table>
<script>
for(i=0;i<mytable.rows.length;i++)
for(j=0;j<mytable.rows[i].cells.length;j++)
alert(mytable.rows[i].cells[j].innerText);
</script>
<tr><td>11</td><td>12</td><td>13</td></tr>
<tr><td>21</td><td>22</td><td>23</td></tr>
</table>
<script>
for(i=0;i<mytable.rows.length;i++)
for(j=0;j<mytable.rows[i].cells.length;j++)
alert(mytable.rows[i].cells[j].innerText);
</script>
myTable.rows[i].cells[j]