.tooltip em {
    display:none;
}
.tooltip:hover {
    border: 0px; 
    position: relative; 
    z-index: 500; 
    text-decoration:none;
}
.tooltip:hover em {
    font-style: normal;
	font-family:Arial, Helvetica, sans-serif;
	font-size:10px; 
    display: block; 
    position: absolute; 
    bottom: 1px; 
    left: 0px; 
    padding:1px; 
    color: #e06600; 
    background: #0c0c0c; 
    width:151px;
}
.tooltip:hover em span {
    position: absolute; 
    top: -7px; 
    left: 15px;
    height: 7px; 
    width: 11px; 
    background: transparent url(image-infobulle.gif); 
    margin:0px; 
    padding: 0px; 
    border: 0px;
}