function lightbox(imageID) {
    var shadow = document.createElement("DIV");
    shadow.id = "SHADOW";
    document.body.appendChild(shadow);

    url = "image.php?imageID=" + imageID;
    XGetRequest(url);
}

function nextLightbox(imageID) {
    removePopup("LIGHT");
    url = "image.php?imageID=" + imageID;
    XGetRequest(url);
}

function closeLightbox(imageID) {
    removePopup("LIGHT");
    removePopup("SHADOW");
}