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

.tooltip span.top{padding: 35px 8px 0;
font-size:16px;
    background: url(bt.gif) no-repeat top}

.tooltip b.bottom{
padding:3px 8px 10px;color: #548912;
overflow:hidden;
font-size:1px;
    background: url(bt.gif) no-repeat bottom}