var nadpisy_div = "content_title";
var texty_div = "content_text";
var fotky_div = "content_photo";
var viacinfo_div = "viac_info";

function sklonuj(element)
{
      var x = 0;
      var sklonovany_element = new Array();
      while(x < element.length)
      {
            sklonovany_element[x] = element[x].cloneNode(true);
            x++;
      }
      return sklonovany_element;
}

function zmen_slide(h1_nadpis, nadpisy, obrazky, texty, odkazy, x)
{

      var y = x + 1; //x - sucasny slajd, y - cielovy slajd
      var pocet_slidov = obrazky.length;
      
      if(x == 0)
      {
            nadpisy[0].style.display="block";
            h1_nadpis[0].style.display="none";
      }
      
      else if(y == pocet_slidov)
      {
            nadpisy[x-1].style.display="none";
            h1_nadpis[0].style.display="block";
      }
      
      else
      {
            nadpisy[x-1].style.display="none";
            nadpisy[x].style.display="block";
      }
      
      if (y == pocet_slidov)
      {
            y = 0;
      }
      
      obrazky[y].style.display="block";
      obrazky[x].style.display="none";
      
      texty[y].style.display="block";
      texty[x].style.display="none";
            
      odkazy[y].style.display="block";
      odkazy[x].style.display="none";
      
      
x++;

if (x == pocet_slidov)
{
x = 0;
}

setTimeout(function(){zmen_slide(h1_nadpis, nadpisy, obrazky, texty, odkazy, x)}, 5000);
}

function start_slideshow()
{
nadpisy_div = document.getElementById(nadpisy_div);
fotky_div = document.getElementById(fotky_div);
texty_div = document.getElementById(texty_div);
viacinfo_div = document.getElementById(viacinfo_div);

var h1_nadpis = nadpisy_div.getElementsByTagName("h1");

var nadpisy = nadpisy_div.getElementsByTagName("h2");

var obrazky = fotky_div.getElementsByTagName("img");

var texty = texty_div.getElementsByTagName("p");

var odkazy = viacinfo_div.getElementsByTagName("a");

setTimeout(function(){zmen_slide(h1_nadpis, nadpisy, obrazky, texty, odkazy, 0)}, 5000);
}

function zmen_slide1(slajd)
{
var x = 0;
var y = 0;
      while(x < slajd.length)
      {
            var nmb=Math.floor(Math.random()*slajd[x].length);
            while(y < slajd[x].length)
            {
                  slajd[x][y].style.display="none";
                  y++;
            }
            y = 0;
            
            slajd[x][nmb].style.display="block";
            x++;
      }
setTimeout(function(){zmen_slide1(slajd)}, 3500);
}


function start_slideshow1()
{
      var box = new Array();
      var slajd = new Array();
      box[0] = document.getElementById("bezkontaktne");
      box[1] = document.getElementById("biometricke");
      box[2] = document.getElementById("kontrolery");
      var x = 0;
      
      while(x < box.length)
      {
            slajd[x] = box[x].getElementsByTagName("div");
            x++;
      }
      
      setTimeout(function(){zmen_slide1(slajd)}, 3500);
}