div.advert {
        position: absolute;
        top: 0;
        left: 0;
        visibility: hidden;
        text-align: center;
        z-index: 22;
}

div.close_btn {
        position: absolute;
        width: 34px;
        height: 34px;
        top: 0;
        right: 0;
        cursor: pointer;
        z-index: 23;
}