.tooltip
{
width: 150px; 
color:#FFF;
font-family: Arial;	
font-size: 11px;
text-decoration:none;
text-align:left;
margin-top: 0px;
margin-left: 45px;
}

.tooltip .top
{    
    padding-top: 10px;
    padding-left: 20px;
    padding-right: 15px;
    background: url(images/bt.gif) no-repeat top
}

.tooltip b.bottom
{
    height: 10px;
    color: #548912;
    background: url(images/bt.gif) no-repeat bottom
}