.left_menu a{
    display:block;
    width: 272px;
    height: 42px;
    background: url(/media/images/menu_off.jpg) no-repeat;
    margin-bottom: 10px;
    line-height: 42px;
    text-decoration: none;
    padding-left:15px;
    font-weight: bold;
    font-size: 12px;
}

.left_menu a:hover {
    color: #fff;
    background: url(/media/images/menu_on.jpg) no-repeat;
}

.left_menu .active {
   background: url(/media/images/menu_on.jpg) no-repeat;
}