.tooltip
{
   width: 291px; 
   color:#000;
   font:lighter 11px/1.3 Arial,sans-serif;
   line-height: 16px;
   text-decoration:none;
   text-align:left;
}

.tooltip span.top
{
   padding: 15px;
   background: url(../images/tooltip.png) no-repeat top;
}

.tooltip b.bottom
{
   padding:3px 8px 15px;
   color: #548912;
   background: url(../images/tooltip.png) no-repeat bottom;
}