var img_dir = './img/galeria/min/';
var big_img_dir = './img/galeria/';
var ext = '.jpg';

var max_left = 0;
var max_right = 0;

function move_left() {
if (max_left) return false;
var elems = document.getElementsByTagName('img');
for (var i=1; i < elems.length; i++) {
if (elems[i].className == 'gal') {
   var tempid = elems[i].id;
   var link = document.getElementById('prefix_'+tempid);
   //TUTAJ MA ZOSTAC AUTOMATYCZNE OBLICZANIE INDEKSU
   var index = parseInt(elems[i].src.split('/').length) - 1;
   var name = parseInt(elems[i].src.split('/')[index].split('.')[0])+1;
   if (name==10) { max_left = true; max_right = 0; }
   elems[i].src = img_dir + name + ext;
   link.href= big_img_dir + name + ext;
  }
 }
}

function move_right() {
  if (max_right) return false;
  var elems = document.getElementsByTagName('img');
  for(var i=(elems.length -1); i>-1; i--) {
  if (elems[i].className == 'gal'){
  var tempid = elems[i].id;
  var link = document.getElementById('prefix_'+tempid);
  //TUTAJ MA ZOSTAC AUTOMATYCZNE OBLICZANIE INDEKSU
  var index = parseInt(elems[i].src.split('/').length) - 1;
  var name = parseInt(elems[i].src.split('/')[index].split('.')[0])-1;
  if (name==1) { max_right = true; max_left = 0; }
  elems[i].src = img_dir + name + ext;
  link.href= big_img_dir + name + ext;
  }
 }
}



/*function move_left() {
 if (max_left) return false;
 var elems = document.getElementsByTagName('img');
 for (var i=1; i < elems.length; i++) {
 if (elems[i].className=='gal') {
   var tempid = elems[i].id;
   var link = document.getElementById('prefix_'+tempid);
   var tab = elems[i].src.split('/', 7);
   var file_name = tab[6];
   var tab2 = file_name.split('.', 2);
   var name = parseInt(tab2[0])+1;
   if (name==10) { max_left = true; max_right = 0; }
   elems[i].src = img_dir + name + ext;
   link.href= big_img_dir + name + ext;
  }
 }
}

function move_right() {
  if (max_right) return false;
  var elems = document.getElementsByTagName('img');
  for (var i=elems.length-1; i <= elems.length; i--) {
  if (elems[i].className=='gal') {
   var tempid = elems[i].id;
   var link = document.getElementById('prefix_'+tempid);
   var tab = elems[i].src.split('/', 7);
   var file_name = tab[6];
   var tab2 = file_name.split('.', 2);
   var name = parseInt(tab2[0]);
   name = name - 1;
   if (name==1) { max_right = true; max_left = 0; }
   elems[i].src = img_dir + name + ext;
   link.href= big_img_dir + name + ext;
  }
 }
}*/