#popup{ display:block; position:fixed; *position: absolute; z-index:99; top:50%; left:50%; }
#backgroundPopup{ display:none; position:absolute; height:100%; width:100%; top:0; left:0; background:#000000; z-index:50; margin:0px !important; }
.title{ text-align: left; padding: 3px 10px; background-color: #124A8D; color: #fff; position: relative; overflow: hidden; margin: 0px !important; }
#close, #back_file, #next_file{ position: absolute; top: 0px; right: 0px; padding: 3px 15px; background-color: #124A8D; color: #fff; text-decoration: none; font-size: 10px; font-weight: bold; }
#close:hover, #back_file:hover, #next_file:hover{ background-color:#35649B; }
.bottom_popup{ background-color: #124A8D; color: #FFF; text-align: center; margin:0px !important; }
.bottom_popup span{ display: block; padding: 3px 15px; }
.bottom_popup #back_file{ float: left; position: relative !important; }
.bottom_popup #next_file{ float: right; position: relative !important; }


    * html{overflow-y: hidden; }
    * html body{overflow-y: auto; height: 100%;}     
    * html #popup {position: absolute; }
    *+ html #popup {position:fixed;}