#mobile_bottom_ad {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
    background: white;
	border-top: 1px solid #999;
    z-index: 9999;
   padding-top: 5px;
    margin: 0;
}

#mobile_bottom_ad_spacer {
    height: 50px;
}

@media (min-width: 701px) {
    #mobile_bottom_ad,
    #mobile_bottom_ad_spacer {
        display: none;
    }
}