#tooltip { 
float:left; 
width:400px; 
padding:150px; 
background-color:#FFFFFF; 
}

a:hover {
background-color:#ffffff; 
text-decoration:none;} /* background-color pour IE6*/

a.tooltip span {
display:none; 
padding:2px 3px; 
margin-top:30px;
margin-left:-20px;
width:350px; 
font-size:14px;
font-weight:bold;
line-height:20px;
z-index:4;
}

a.tooltip:hover span{
display:inline; 
position:absolute; 
background:#D9FFD9; 
color: #000;
padding:20px;
}