用了透明png后,鼠标事件不能用了

[yuzhoumayi]

<div id="Layer1" style="BORDER-RIGHT:#000000 1px; BORDER-TOP:#000000 1px; Z-INDEX:1; FILTER:progid:DXimageTransform.Microsoft.AlphaImageLoader(src=images/sysmanage.png); LEFT:125px; VISIBILITY:hidden; BORDER-LEFT:#000000 1px; WIDTH:99px; BORDER-BOTTOM:#000000 1px; POSITION:absolute; TOP:384px; HEIGHT:75px; BACKGROUND-COLOR:transparent"
runat="server">
<table style=" WIDTH: 96px; CURSOR: hand; POSITION: absolute; HEIGHT: 80px; BACKGROUND-COLOR: transparent"
height="80" border="1">
<tr height="50%">
<td borderColor="#00ffff" width="90%"><a href="http://www.sina.com">.</a>
</td>
<td id="_reload" borderColor="#ff0000" runat="server"></td>
</tr>
<tr height="50%">
<td bordercolor="#000099" style="CURSOR: hand">2</td>
<td bordercolor="#cc00cc" onclick="alert(111)" width="70%">3</td>
</tr>
</table>
</div>
代码如上.<A>和onclick都不能用了!
急呀!谁知道怎么解决吗?
谢了!

[zwkandy]

要用VISIBILITY:hidden这个吗，试了一下，有这个都看不到了。删除掉就看到了。