a.guin {   position: relative; color: white; text-decoration: none;
   border-bottom: 0px gray dotted; /* On souligne le texte. */}
a.guin span { display: none; }
a.guin:hover { background: none;/*IE*/ z-index: 5000;  cursor: pointer;}
a.guin:hover span {
   display: inline; position: absolute;
   white-space: nowrap; 
   top: -80px !important; top:-75px; left: -10px; background: black; color: white; padding: 0px; border: 0px solid green; border-left: 0px solid green;}