body{background-color:#496091;}

#seance a:hover 
{color: white; 
background: #596D61; 
font: italic;}

#seance a span 
{display: none;}

#seance a:hover span 
{display: block;
position: absolute; 
top: 576px; 
left: 120px; 
width: 180px;
padding: 5px; 
margin: 0; 
z-index: 100;
color: white; 
background: #596D61;
font: 15px Verdana, sans-serif; 
text-align: center;}