.jarallax {
    position: relative;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    z-index: 1;
}

/* demo styles */
*, *:after, *:before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.jarallax {
    min-height: 580px;
}