function display_thumbs() {
	var thumbnails_content = '';
	start_img = ((start_img+img_num)>thumbnails.length)?(thumbnails.length-img_num-1):start_img;
	start_img = (start_img < 0)?0:start_img;
	var end_img = (start_img+img_num);
	end_img = (end_img >= thumbnails.length)?(img_num-1):end_img;
	
	document.getElementById('leftarrow').style.visibility = (start_img <= 0)?'hidden':'visible';
	document.getElementById('rightarrow').style.visibility = (end_img >= (thumbnails.length-1))?'hidden':'visible';
	for(img = start_img; img < end_img; img++) {
		if(thumbnails[img] != undefined) {
			thumbnails_content += thumbnails[img] + ' ';
		}
	}
	document.getElementById('thumbnails').innerHTML = thumbnails_content;
	thumbnailviewer2.init();
}