层在经过表单元素时候会显示在表单元素下面,同样经过FLASH的时候也会被FLASH掩盖,怎么能让层显示在他们上面呢?

解决了

<div id="menu" style="position:absolute; visibility:hidden; top:20px; left:20px; width:100px; height:200px; background-color:#6699cc;">
<table>
<tr><td>item 1</td></tr>
<tr><td>item 2</td></tr>
<tr><td>item 3</td></tr>
<tr><td>item 4</td></tr>
<tr><td>item 5</td></tr>
</table>
<iframe src="javascript:false" style="position:absolute;visibility:inherit;top:0px;left:0px;z-index:-1;filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';"></iframe>
</div>

<a href="#" onmouseover="document.getElementById('menu').style.visibility='visible'">menu</a>

<form>
<select><option>A form selection list</option></select>
</form>