.tooltip{
width: 253px; color:#fff;
font:lighter 12px Arial,sans-serif;
text-decoration:none;text-align:left}

.tooltip span.top{padding: 14px 14px 0 14px;
    background: url(bt.png) no-repeat top}

.tooltip b.bottom{padding:5px 0 12px 0;
    background: url(bt.png) no-repeat bottom}