.tooltip{
width: 200px; color:#000;
font:lighter 11px/1.3 Arial,sans-serif;
text-decoration:none;
text-align:center;
}

.tooltip span.top{
padding: 30px 8px 0;
background: url(../images/bt.gif) no-repeat top;
}

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