a.tooltip em {
    display:none;
}
a.tooltip:hover {
    border: 0; 
    position: relative; 
    z-index: 500; 
    text-decoration:none;
}
a.tooltip:hover em {
	font-style: oblique;
	display: block;
	position: absolute;
	top: 20px;
	left: -10px;
	padding: 5px;
	color: #030303;
	border: 1px solid #000;
	background: #ffc;
	width:170px;
}
a.tooltip:hover em span {
    position: absolute; 
    top: -7px; 
    left: 15px;
    height: 7px; 
    width: 11px; 
    background: transparent url(image/infobulle.gif);  
    margin:1; 
    padding: 0; 
    border: 0;
}