层定位

<html><head>
<meta http-equiv=Content-Type content=text/html;charset=gb2312>
<title></title>
</head>
<table width="100" border="0" align="center">
<tr>
<td>aaaaaaa</td>
</tr>
<tr>
<td> <div id="Layer1" style="position:absolute; width:236px; height:166px; z-index:1; background-color: #6666FF; layer-background-color: #6666FF; border: 1px none #000000;"></div></td>
</tr>
</table>
</body></html>