.tooltip {
width: 150px;
font-family: Arial, Helvetica, sans-serif;
text-decoration: none;
text-align: center;
font-weight: bold;
font-size: 12px;
color: #3e3e3e;
}

.tooltip span.top {
background: url(tooltip.gif) no-repeat top;
padding-top: 40px;
}

.tooltip b.bottom {
background: url(tooltip.gif) no-repeat bottom;
padding:3px 8px 15px;
color: #548912;
}