var art_diff = 970;

$(document).ready(function() {
	$('#art_next').click(nextArtSlide);
	$('#art_prev').click(prevArtSlide);
});

function nextArtSlide() {
	var elem = $('.selected_slide');
	var next = elem.next();
	var art_count = parseInt($('#art_count').text());
	if(!next.hasClass('art_slide')) {
		return;
		next = elem.parent().find('.art_slide:first');
		art_count = 0;
	}
	art_count++;
	$('#art_count').text(art_count);
	
	elem.removeClass('selected_slide');
	next.addClass('selected_slide');
	next.removeClass('hidden');
	elem.animate({
		left: -art_diff
	}, 500, function() {
		elem.addClass('hidden');
	});
	
	next.animate({
		left: 0
	}, 500);
	
	$('#nav_prev').show();
	if(!next.next().hasClass('art_slide')) {
		$('#nav_next').hide();
	}
}

function prevArtSlide() {
	$('#pic_loading').fadeIn('fast');
	var elem = $('.selected_slide');
	var prev = elem.prev();
	var art_count = parseInt($('#art_count').text());
	if(!prev.hasClass('art_slide')) {
		return;
		prev = elem.parent().find('.art_slide:last');
		art_count = parseInt($('#total_pics').text())+1;
	}
	art_count--;
	$('#art_count').text(art_count);
	
	elem.removeClass('selected_slide');
	prev.addClass('selected_slide');
	prev.removeClass('hidden');
	elem.animate({
		left: art_diff
	}, 500, function() {
		elem.addClass('hidden');
	});
	
	prev.animate({
		left: 0
	}, 500);
	
	$('#nav_next').show();
	if(!prev.prev().hasClass('art_slide')) {
		$('#nav_prev').hide();
	}
}