#body-overlay > div {
    position: absolute; /* makes the div go into a position that’s absolute to the browser viewing area */
    left: 50%; /* positions the div half way horizontally */
    top: 300px; /* positions the div half way vertically */
    margin-left: -8em;
}

#body-overlay {
    position: absolute; /* makes the div go into a position that’s absolute to the browser viewing area */
    left: 0; /* positions the div half way horizontally */
    top: 0; /* positions the div half way vertically */
    background-color: #ffffff;
    opacity: 0.6;
    width: 100%;
    height: 100%;
    z-index: 100000; /* makes the div the top layer, so it’ll lay on top of the other content */
    margin-top: 0px !important; /* assure other styles do not interfere with this */
}