#overlay
{
    display: none;
    position: absolute;
    top: 0%;
    left: 0%;
    width: 100%;
    height: 100%;
    background-color: black;
    z-index:1001;
    -moz-opacity: 0.8;
    opacity:.80;
    filter: alpha(opacity=80);
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="./images/overlay.png", sizingMethod="scale");
    background-image: url(./images/overlay.png);
}
.registration_form
{
    display: none;
    position: absolute;
    top: 15%;
    left: 25%;
    width: 450px;
    height: 450px;
    z-index:1002;
    overflow: auto;
}
* html #overlay
{
        background-color: #000;
        back\ground-color: transparent;
        background-image: url(blank.gif);
        filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="./images/overlay.png", sizingMethod="scale");
}