.navi a i{
    font-size: 8px;
	visibility: hidden;  
  }
  .navi a{
	float: left;
	display:block;
	height:27px;
  }
  .main{
	width:78px;
	background: url(img/n_main.gif);
  }
  .main:hover{
	background: url(img/n_main_s.gif);
  }
  .program{
	width:65px;
	background: url(img/n_program.gif);
  }
  .program:hover{
	background: url(img/n_program_s.gif);
  }
  .travel{
	width:86px;
	background: url(img/n_travel.gif);
  }
  .travel:hover{
	background: url(img/n_travel_s.gif);
  }
  .dates{
	width:122px;
	background: url(img/n_dates.gif);
  }
  .dates:hover{
	background: url(img/n_dates_s.gif);
  }
  .authors{
	width:104px;
	background: url(img/n_authors.gif);
  }
  .authors:hover{
	background: url(img/n_authors_s.gif);
  }  
  .contact{
	width:63px;
	background: url(img/n_contact.gif);
  }
  .contact:hover{
	background: url(img/n_contact_s.gif);
  }
 .venue{
	width:54px;
	background: url(img/n_venue.gif);
  }
  .venue:hover{
	background: url(img/n_venue_s.gif);
  }
 .papers{
	width:53px;
	background: url(img/n_papers.gif);
  }
  .papers:hover{
	background: url(img/n_papers_s.gif);
  }