function show_next_image (step) {
	imgcurrent+=step;
	if(imgcurrent >= imgcount) {imgcurrent = 0;}
	if(imgcurrent < 0) {imgcurrent = imgcount - 1;}
	
	var img = document.getElementById('article_imgs');
	var hrf1 = document.getElementById('article_hrefs1');
	var hrf2 = document.getElementById('article_hrefs2');
	var capt = document.getElementById('article_capt');
	var image_num = document.getElementById('image_num');
	
	image_num.innerHTML = imgcurrent + 1;
	img.src = imgs[imgcurrent][1];
	img.width = imgs[imgcurrent][5];
	img.height = imgs[imgcurrent][6];
	img.title = imgs[imgcurrent][4];
	img.alt = imgs[imgcurrent][4];
	hrf1.href = imgs[imgcurrent][0];
	hrf2.href = imgs[imgcurrent][0];
	capt.innerHTML = imgs[imgcurrent][2];
}