<table border="1" width="100%" id=a>
<tr>
<td width="100%" > </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
</table>
<script>
document.onclick=a;
function a(){
if(window.event.srcElement.offsetParent)window.event.srcElement.innerText="ok"
}
</script>
<tr>
<td width="100%" > </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
</table>
<script>
document.onclick=a;
function a(){
if(window.event.srcElement.offsetParent)window.event.srcElement.innerText="ok"
}
</script>
<tr>
<td width="100%" > </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
<tr>
<td width="100%"> </td>
</tr>
</table>
<script>
document.onclick=a;
function a(){
if(window.event.srcElement.offsetParent)alert("这是第"+(window.event.srcElement.parentElement.rowIndex+1)+"行")
}
</script>