#infobox
{
 z-index:11;
 position:fixed;                                                                                                                                                                             
 top:0;
 left:0;
 right:0;
 bottom:0;
 background-color:rgba(0,0,0,0.3);
 width:100%;
 height:100%;
 display:none;
}

#mail_f1, #mail_f2, #mail_f3
{
 visibility:hidden;
 background-color:#eee;
 width:400px;
 max-width:85%;
 height:80px;
 padding:15px;
 border: 1px solid maroon;
 font-size:16px;
 font-weight:bold;
 color:#dd2020;

 margin-top:-40px;
 margin-left:-200px;
 position:absolute;
 top:50%;
 left:50%;
 z-index:12;
}