GoFuckYourself.com - Adult Webmaster Forum - Javascript code for Roll on popup window?

do you main a traditional popup or an overlay window ?

heres a simple overlay example.
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

    <head>

        <title>ROLLOVER EXAMPLE</title>

        <style>

        .black_overlay{

            display: none;

            position: absolute;

            top: 0&#37;;

            left: 0%;

            width: 100%;

            height: 100%;

            background-color: black;

            z-index:1001;

            -moz-opacity: 0.8;

            opacity:.80;

            filter: alpha(opacity=80);

        }

        .white_content {

            display: none;

            position: absolute;

            top: 25%;

            left: 25%;

            width: 50%;

            height: 50%;

            padding: 16px;

            border: 16px solid orange;

            background-color: white;

            z-index:1002;

            overflow: auto;

        }

    </style>

    </head>

    <body>

        <p>This is the main content. To display a Rollover box roll your mouse over <a href = "javascript:void(0)" onmouseover = "document.getElementById('light').style.display='block';document.getElementById('fade').style.display='block'">this</a></p>

        <div id="light" class="white_content">This is the hidden box content. <a href = "javascript:void(0)" onmouseover = "document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'">Close</a></div>

        <div id="fade" class="black_overlay"></div>

    </body>

</html>