.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(/public/images/bt.gif) no-repeat top}

.tooltip b.bottom{padding:3px 8px 15px;color: #548912;
 background: url(/public/images/bt.gif) no-repeat bottom}
 
 .tip {
    color: green;
    cursor: pointer;
    font-weight: bold;
}