#top-body {
        height: 400px;
        width: 100%;
        vertical-align: middle;
        background:url("./../images/content_top_background.jpg") 50% 0px no-repeat;
        background-position :center;
        background-size:cover;

}


@media only screen and (max-width: 640px){

#top-body {
        height: 200px;
}

}