.apri{ font-size:18px; font-family:Verdana, Geneva, sans-serif; float:right; margin-right:50px;}
.chiudi{ font-size:18px; color:#000; font-weight:bold; position:absolute; right:2%; top:0%;  cursor:pointer;}
.overlay{
    background:#000;
    position:fixed;
    top:0px;
    bottom:0px;
    left:0px;
    right:0px;
    z-index:100;
    cursor:pointer;
/*Trasperenza cross browser*/
opacity: .7; filter: alpha(opacity=70);
-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=70)";   
 
}
 
#box{ width:600px; height:480px; background-color:#FFF; display:none; z-index:+300; position:absolute; left:30%; top:20%; -moz-border-radius: 15px;  -webkit-border-radius: 15px;
border-radius: 15px;}