function updateLightbox() {
    _centerLightbox();
}


function _centerLightbox() {
    e = jQuery(".lightbox");
    e.css("position", "absolute");
    e.css("width", "auto");
    e.css("height", "auto");
    var width = e.width();
    var height = e.height();
    var x = (jQuery(window).width() - width) / 2;
    var y = ((jQuery(window).height() - height) / 2) + jQuery(window).scrollTop();
    x = x < 0 ? 0 : x; y = y < 0 ? 0 : y;
    e.css("left", x + "px");
    e.css("top", y + "px");
}