#menu {
    font-size: 14px;
    margin-top: 27px;
    margin-left: 100px;
}

.menu_onon {
    border-top: 4px solid #00a8ff;
    margin-top: 28px;
    display: none;
}

.menu_on {
    border-top: 4px solid #00a8ff;
    margin-top: 28px;
    display: none;
}

    .menu_on ul li a {
        color: #666;
        text-decoration: none;
        height: 39px;
        float: left;
        overflow: hidden;
    }

#menu ul {
    padding: 0;
    margin: 0;
}

#menu li {
    position: relative;
    width: 90px;
    display: inline-block;
    text-align: center;
    height: 50px;
    float: left;
}

    #menu li a {
        color: #333;
        text-decoration: none;
        width: 90px;
        text-align: center;
    }

    #menu li ul {
        position: absolute;
        left: 0px;
        height: auto;
        border: 1px solid #eee;
        z-index: 99;
        width: 90px;
        top: 51px;
        _top: 55px;
        line-height: 45px;
        overflow: hidden;
        background-color: #fff;
    }

        #menu li ul li {
            height: 45px;
        }