#wrap #header .gnb ul li {
    float: left;
    text-align: center;
    padding: 0 5px 0 5px;
    list-style: none;
    position: relative;
}

#wrap #header .gnb ul li a.m01 {
    background: url("../images/header/top_menu.png") no-repeat 0 0;
    display: block;
    text-indent: -999px;
    width: 40px;
    height: 40px;
}

#wrap #header .gnb ul li a.m01:hover {
    background: url("../images/header/top_menu.png") no-repeat 0 -40px;
    display: block;
    text-indent: -999px;
    width: 40px;
    height: 40px;
}