function ShowVideo(position) {
    jQuery("div#movies span").hide();
    jQuery("#movie" + position).show();
}

function ShowPreviousVideo() {
    var current = jQuery("div#movies span:visible");
    var previous = jQuery(current).prev();
    if (previous.length != 0) {
        jQuery("div#movies span").hide();
        jQuery(previous).show();
    }
}

function ShowNextVideo() {
    var current = jQuery("div#movies span:visible");
    var next = jQuery(current).next();
    if (next.length != 0) {
        jQuery("div#movies span").hide();
        jQuery(next).show();
    }
}

function ShowGallerySet(position) {
    jQuery("div.galleryset").hide();
    jQuery("#galleryset" + position).show();
}

function ShowPreviousGallerySet() {
    var current = jQuery("div.galleryset:visible");
    var previous = jQuery(current).prev();
    if (previous.length != 0) {
        jQuery("div.galleryset").hide();
        jQuery(previous).show();
    }
}

function ShowNextGallerySet() {
    var current = jQuery("div.galleryset:visible");
    var next = jQuery(current).next();
    if (next.length != 0) {
        jQuery("div.galleryset").hide();
        jQuery(next).show();
    }
}