function podzielStringIzamien (stringDoPodzialu)
   {
   var separator = "_sz.jpg";
   var tablicaStringow = stringDoPodzialu.split(separator);
   var preSRC = tablicaStringow[0];
   var separator = "miniaturki/";
   var sciezka = "../img/";
   var tablicaStringow = preSRC.split(separator);
   var ostatni = tablicaStringow.length-1;
   var newsrc = sciezka + tablicaStringow[ostatni];
   var newURL = 'url\(' + newsrc + '.jpg\)';
   document.getElementById('subPageGal').style.backgroundImage = newURL;
   }

function podzielStringIszary (stringURL,sID)
   {
   var separator = ".jpg";
   var tablicaStringow = stringURL.split(separator);
   var preSRC = tablicaStringow[0];
   var newURL = preSRC + '_sz.jpg';
   document.getElementById(sID).src = newURL;
   }
   
function podzielStringIkolor (stringURL,sID)
   {
   var separator = "_sz.jpg";
   var tablicaStringow = stringURL.split(separator);
   var preSRC = tablicaStringow[0];
   var newURL = preSRC + '.jpg';
   document.getElementById(sID).src = newURL;
   }