#topmenu ul li a.current_index {
    color: #000;
    font-weight: bold;
    background: #fff url(images/outline/topmenu-active-l.gif) 0 0 no-repeat;
}

#topmenu ul li a.current_index span {
    display: block;
    width: auto;
    background: #fff url(images/outline/topmenu-active-r.gif) 100% 0 no-repeat;
}