a.info{
    position:relative; 
    z-index:24; background-color:#253A85;
    color:#000;
    text-decoration:none}

a.info:hover{z-index:25; background-color:#253A85}

a.info span{display: none}

a.info:hover span{ 
/*le contenu de la balise span ne 
sera visible que pour l'état a:hover */
 display:block; 
 position:absolute;
    
    
    top:3em; left:-4em; width:20em;
    border:1px solid #6699cc;
    background-color:#333399; color:#88bbdd;
    text-align: left;
    font-weight:12px;
    padding:1px;
    
    }