#middle #middle-cont {
    width: 100%;
    height: 100%;
    background-image: url('../../images/horarios/horarios.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}
#contenido img {
    width: 100%;
    max-width: 960px;
    height: auto;
    margin: 0 auto;
    display: block;
}