<html>
<head>
<title>Test</title>
<style>
a {
color:black;
text-decoration: none;
}
#tanchu {
visibility: hidden;
position: absolute;
top: 25%;
left: 25%;
width: 50%;
height: 50%;
padding: 16px;
border: 10px solid #3071A9;
z-index:2;
overflow: auto;
filter: alpha(opacity=70);
-moz-opacity: 0.7;
opacity: 0.7;
}
</style>
</head>
<body>
<a href="javascript:void(0)" onclick="document.getElementById('tanchu').style.visibility='hidden'">[隐藏]</a>
<a href="javascript:void(0)" onclick="document.getElementById('tanchu').style.visibility='visible'">
[显示]</a></div>
<div id="tanchu">
这里是弹出层上的文字
</div>
</body>
</html></td>
</tr>
</table>