var rightID = 2;
var leftID = 0;


function scrollVideoRight() {
	var countVideos = $$('.adv_mediabox_video_preview').length;
	var scroll = new Fx.Scroll('adv_mediabox_videos_outer');
	scroll.toElement('video_prev_'+rightID);
	$$('.media_browse_left').setStyle('display','block');
	rightID++;
	if(rightID > countVideos) $$('.media_browse_right').setStyle('display','none');
	leftID++;
}

function scrollVideoLeft() {
	var scroll = new Fx.Scroll('adv_mediabox_videos_outer');
	scroll.toElement('video_prev_'+leftID);
	$$('.media_browse_left').setStyle('display','block');
	leftID--;
	if(leftID <= 0) $$('.media_browse_left').setStyle('display','none');
	$$('.media_browse_right').setStyle('display','block');
	rightID--;
}

function showMedia(mediatype){
	if(mediatype == 'videos'){
		$$('.adv_mediabox_videos').setStyle('display','block');
		$$('.adv_mediabox_galeries').setStyle('display','none');
		$$('.adv_mediabox_podcasts').setStyle('display','none');
	}
	else if(mediatype == 'bilder'){
		$$('.adv_mediabox_videos').setStyle('display','none');
		$$('.adv_mediabox_galeries').setStyle('display','block');
		$$('.adv_mediabox_podcasts').setStyle('display','none');
	}
	else if(mediatype == 'podcast'){
		$$('.adv_mediabox_videos').setStyle('display','none');
		$$('.adv_mediabox_galeries').setStyle('display','none');
		$$('.adv_mediabox_podcasts').setStyle('display','block');
	}
}

var topID = 2;
var bottomID = 0;


function scrollGaleriesBottom() {
	var countVideos = $$('.adv_mediabox_galeries_preview').length;
	var scroll = new Fx.Scroll('adv_mediabox_galeries_outer');
	scroll.toElement('galeries_prev_'+topID);
	$$('.galeries_browse_top').setStyle('display','block');
	topID++;
	if(topID > (countVideos-2)) $$('.galeries_browse_bottom').setStyle('display','none');
	bottomID++;
}

function scrollGaleriesTop() {
	var scroll = new Fx.Scroll('adv_mediabox_galeries_outer');
	scroll.toElement('galeries_prev_'+bottomID);
	$$('.galeries_browse_bottom').setStyle('display','block');
	bottomID--;
	if(bottomID <= 0) $$('.galeries_browse_top').setStyle('display','none');
	$$('galeries_browse_bottom').setStyle('display','block');
	topID--;
}

function scrollPodcastsBottom() {
	var countVideos = $$('.adv_mediabox_podcasts_preview').length;
	var scroll = new Fx.Scroll('adv_mediabox_podcasts_outer');
	scroll.toElement('podcasts_prev_'+topID);
	$$('.podcasts_browse_top').setStyle('display','block');
	topID++;
	if(topID > (countVideos-2)) $$('.podcasts_browse_bottom').setStyle('display','none');
	bottomID++;
}

function scrollPodcastsTop() {
	var scroll = new Fx.Scroll('adv_mediabox_podcasts_outer');
	scroll.toElement('podcasts_prev_'+bottomID);
	$$('.podcasts_browse_bottom').setStyle('display','block');
	bottomID--;
	if(bottomID <= 0) $$('.podcasts_browse_top').setStyle('display','none');
	$$('podcasts_browse_bottom').setStyle('display','block');
	topID--;
}