.black_overlay{ 
    display: none; 
    position: absolute; 
    top: 0%; 
    left: 0%; 
    width: 100%; 
    background-color: #555; 
    z-index:1001; 
    -moz-opacity: 0.8; 
    opacity:.80; 
    filter: alpha(opacity=80); 
} 
.white_content { 
    display: none; 
    position: absolute; 
    top: 25%; 
    left: 65%; 
    padding-top:2px; 
    border: 1px solid #acc8df; 
    background-color: white; 
    z-index:1002; 
    overflow: auto; 
}