怎么取得 html中的table里某一行的行数 是通过 link 触发的事件

Question

<table border="1" cellspacing="0" cellpadding="0" bgcolor="#FFFFFF" id="TT">
<tbody>
<logic:iterate name="P00301Form" id="detail" property="details" indexId="index" >
<tr id =<bean:write name="index" />>
<td align="left"><div style="word-break:break-all; width:50px;"><bean:write name="detail" property="controlNO" /></div></td>
<td align="left"><div style="word-break:break-all; width:80px;"><bean:write name="detail" property="productNumber" /></div></td>
<td align="left"><div style="word-break:break-all; width:160px;"><bean:write name="detail" property="productName" /></div></td>
<td align="right"><div style="word-break:break-all; width:70px;">
<bean:write name="detail" property="orderNumber" /><br>
<bean:write name="detail" property="transferMoney" /></div></td>
<td align="center"><div style="word-break:break-all; width:70px;">
<bean:write name="detail" property="requestDay" /><br>
<bean:write name="detail" property="hopeDay" /></div></td>
<td align="center"><div style="word-break:break-all; width:90px;">&nbsp;
<html:link href="javascript:open_window_chokuso()" >
<bean:write name="detail" property="index" />
<bean:write name="detail" property="directSend" /></html:link><br>
<bean:write name="detail" property="userName" /></div></td>
<td align="center"><div style="word-break:break-all; width:35px; align:center;">
<bean:write name="detail" property="status" /></div></td>
<td align="center"><div style="word-break:break-all; width:30px;">
<html:checkbox name="detail" property="cancelFlag"></html:checkbox></div></td>
</tr>
</logic:iterate>
</tbody>
</table>
<script>
var oTable = document.getElementById('TT');
alert('表格总行数:'+oTable.rows.length);
alert('第一行列数：' + oTable.rows[0].cells.length);
</script>