function zmen_jazyk(lang) {
	var puv, novy;

   novy = "/"+lang+"/";

   if (location.href.indexOf("/cz/") > 1) puv = "/cz/";
    else if (location.href.indexOf("/en/") > 1) puv = "/en/";
     else if (location.href.indexOf("/nl/") > 1) puv = "/nl/";

   if (novy != puv) location.href = location.href.replace(puv, novy);

 }