#fade {
display: none;
background-color: #000;
position: fixed;
left: 0;
top: 0;
width: 100%; height: 100%;
opacity: .70;
z-index: 1000000;
}
#popupBlock {
display: none;
background-color: #FFFFFF;
float: left;
position: fixed;
top: 50%;
left: 50%;
z-index: 1000001;
}

/*--Making IE6 Understand Fixed Positioning--*/
*html #fade {
position: absolute;
}
*html #popupBlock {
position: absolute;
}