怎样让一个绝对层把select框盖住？？？急用

 1<html>
 2<head>
 3<title>Untitled Document</title>
 4<meta content="text/html; charset=utf-8" http-equiv="Content-Type"/>
 5</head>
 6<body bgcolor="#FFFFFF" text="#000000">
 7<div id="Layer1" style="position:absolute; left:11px; top:13px; width:439px; height:224px; z-index:100; background-color: #CCCCCC; layer-background-color: #CCCCCC; border: 1px none #000000; overflow: visible"></div>
 8<p>
 9<input name="textfield" type="text"/>
10</p>
11<p>
12<select name="select">
13</select>
14</p>
15</body>
16</html>

好像绝对层盖不住select框呀！怎么让select 框在绝对层的下面，看不到

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 1<html>
 2<head>
 3<title>袁飞演示程序: 如何盖住(下拉列表框) Select ?</title>
 4<meta content="text/html; charset=utf-8" http-equiv="Content-Type"/>
 5</head>
 6<body bgcolor="#ffffff" ms_positioning="GridLayout" text="#000000">
 7<p>
 8<input name="textfield" type="text"/>
 9</p>
10<p>    
11<select name="select">
12<option selected="" value="fdsa">fdsa</option>
13</select>
14</p>
15<object style="Z-INDEX: 1000; LEFT: 47px; WIDTH: 152px; POSITION: absolute; TOP: 5px; HEIGHT: 200px" type="text/x-scriptlet">
16<param name="Scrollbar" value="0"/>
17<param name="URL" value="about:blank"/>
18</object>
19</body>
20</html>