.invisibile {
   position:absolute; top:-100px;
   width:1px; height:1px;
   overflow:hidden;}

.visibile {
   position:static;
   top:0;
   width:auto;
   height:auto;
   overflow:auto;
   margin:0px;
   padding:0px;
   text-align:left;}

#diapositive { 
  margin:0 0 0 -40px;
  padding:0px;}

#diapositive ul li { 
  list-style-type : none;
  margin:0px;
  padding:0px;}

#pulsantiera a {
  color: #369;
  text-decoration:none;
  cursor:pointer;}

#pulsantiera a:hover {
  text-decoration:none;
  color: #000;
  cursor:pointer; }