求一段代码 高手进!!!!!!!!!!!11

求一段代码.类似动网的打开首页后,有一个悬浮的快捷按纽.鼠标放上去显示出来,不放在上面就自动隐藏的,

<a href="" onmousemove="MM_showHideLayers('Layer1','','show')">aaaa</a></TD>

<TD width="9%"><A href="aaaa.asp()"

target=_parent>aaaa</A>

<div id="Layer1">

<table width="100%" border="0" bgcolor="#CCCCCC">

<tr>

<td><a href="aaaa.asp">aaaa</a></td>

</tr>

<tr>

<td><a href="bbbb.asp">bbbb</a></td>

</tr>

<tr>

<td><a href="cccc.asp">cccc</a></td>

</tr>

<tr>

<td><a href="dddd.asp">dddd</a></td>

</tr>

</table>

</div>