.jumpdesk {
    height: 350px;
    overflow: hidden;
}

.screenx {
    display: block;
    height: 400px;
    overflow: hidden;
    position: relative;
    border: 2px solid #b3b3b3;
    border-radius: 1px;
    margin: 0 auto;
}

    .screenx img {
        max-width: 100%;
        height: auto;
        position: absolute;
        z-index: 0;
        margin: auto;
        left: 0;
        right: 0;
        padding: 0;
    }