* { padding:0; margin:0; }
.slideshow { cursor:pointer; z-index: 101; }
#overlay { position: fixed; top: 0; left: 0; height:100%; width:100%; background-color:#000; display:none; filter:alpha(opacity=50); -moz-opacity: 0.50; opacity: 0.50; float: left; z-index: 101; }    
#window { background:white; border-width: 10px; border-color: White; border-style: solid; display:none; left:50%; position: fixed; top:50%; float: left; z-index: 102; }    
#window .caption, .hidden { display:block; float:left; font-size:12px; padding:5px 0; text-align:justify; }
#window a.prev { background-image:url(http://www.ascsa.edu.gr/images/uploads/prev.gif); background-repeat:  no-repeat; background-position: 50% 50%; display:block; float:left; height:14px; text-decoration:none; width:35px; }
#window a.next { background-image:url(http://www.ascsa.edu.gr/images/uploads/next.gif); background-repeat:  no-repeat; background-position: 50% 50%; display:block; float:right; height:14px; text-decoration:none; width:35px; }