function set_picture(car_id, id) {
  id = $("#" + id);
  id.addClass("active");
  if(id != null) {
    $(".active").removeClass("active");
    id.addClass("active");
    if($('#picture_big')[0].src != id[0].alt) {
      	$('#picture_big')[0].src = id[0].alt;
	$('#car_gallery')[0].href = "show_gallery_picture/" + car_id + "?picture_id=" + id[0].id.replace('picture_', '');
//id[0].alt.replace('_big.','.');
    }
  }
}