.modal-overlay   
{   
    position:fixed;   
    top:0;   
    right:0;   
    bottom:0;   
    left:0;   
    height:100%;   
    width:100%;   
    margin:0;   
    padding:0;   
    background:#000;   
    opacity:.75;   
    filter: alpha(opacity=75);   
    -moz-opacity: 0.75;   
    z-index:101;   
}   
.modal-window   
{   
    position:fixed;   
    top:50%;   
    left:50%;   
    margin:0;   
    padding:0;   
    z-index:102;   
}   
.close-window   
{   
    position:absolute;   
    width:32px;   
    height:32px;   
    right:8px;   
    top:8px;   
    background:transparent url('/portfolio-tilt/close-button.png') no-repeat scroll right top;   
    text-indent:-99999px;   
    overflow:hidden;   
    cursor:pointer;   
    opacity:.5;   
    filter: alpha(opacity=50);   
    -moz-opacity: 0.5;   
}   
.close-window:hover   
{   
    opacity:.99;   
    filter: alpha(opacity=99);   
    -moz-opacity: 0.99;   
}