.tooltip{ 
    position: absolute; 
    top: 0; 
    left: 0; 
    z-index: 3; 
    display: none;
    background: transparent url(images/tooltip_bg.png) repeat;
    font-size: 12px;
    font-family: arial;
    color: #fff;
    font-weight: bold;
    padding: 7px  5px  10px 14px;
    width: 180px;
    text-align: left;
}