.black_overlay{
display: none;
position: absolute;
top: 0;
width: 960px;
background-color: black;
z-index:1001;
-moz-opacity: 0.8;
opacity:.80;
filter: alpha(opacity=80);
}
.white_content {
display: none;
position: absolute;
top: 50px;
width: 860px;
padding: 5px;
background-color: white;
z-index:1002;
overflow: auto;
}