#popupContact {
    margin: 0 auto;
    position: absolute;
    width: 600px;
    z-index: 9999;
    top: 20px; 
    left:350px;
}
#popupContact img.close:hover { cursor: pointer; }
#backgroundPopup {
    background: none repeat scroll 0 0 #000000;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9998;
    opacity: 0.5;
}