#overlay-mobile {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: 0.5;
    filter: alpha(opacity=50);
    display: none;
}

#welcome-ad-mobile {
    position:fixed;
    padding:0px;
    display: none;
    top: 0;
    left: 0;
    width: 100%;
    heigth: auto;
}

#welcome-ad-mobile-content {
    background:#fff;
    padding:10px 0px 8px;
}

#welcome-ad-mobile-close {
    position:absolute;
    background:url(close.png) 0 0 no-repeat;
    width:27px;
    height:27px;
    display:block;
    text-indent:-9999px;
    top:-12px;
    right:-1px;
}