function slideshow_prev_picture()
{
	if(slideshow_id == 0)
	{
		slideshow_id = slideshow_pictures.length - 1;
	}
	else
	{
		slideshow_id--;
	}
	jQuery('#slideshow_picture').css({background: '#eee url(' + slideshow_pictures[slideshow_id]['src'] + ') no-repeat 50% 50%'});
	jQuery('#slideshow_description').html(slideshow_pictures[slideshow_id]['title']);
}

function slideshow_next_picture()
{
	slideshow_id++;
	if(slideshow_id > slideshow_pictures.length)
	{
		slideshow_id = 0;
	}
	jQuery('#slideshow_picture').css({background: '#eee url(' + slideshow_pictures[slideshow_id]['src'] + ') no-repeat 50% 50%'});
	jQuery('#slideshow_description').html(slideshow_pictures[slideshow_id]['title']);
}