function show_img(number) {
	var count_img = 3;
	
	if ($('pic'+number)) {
		for(var i=1; i<(count_img+1); i++) {
			if ($('pic'+i)) {
				var pic = $('pic'+i);
				if (pic.style.display != 'none') {
					pic.style.display = "none";
				}
			}
		}
		
		var view = $('pic'+number);
		view.style.display = "block";
		return;
	}
}