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

.tooltip span.top{height:25px;padding: 6px 8px 0;background: url(bt.gif) no-repeat top}
.tooltip b.bottom{padding:1px 8px 6px;color: #477112;background: url(bt.gif) no-repeat bottom}