$('html').addClass('js');

$(function() {

  var timer = setInterval( showDiv, 4000);

  var counter = 1;

  function showDiv() {
    if (counter ==0) { counter++; return; }

    $('#div1, #div2, #div3')
      .stop()
      .fadeOut()
      .filter( function() { return this.id.match('div' + counter); })
      .fadeIn();
    counter == 4? counter = 0 : counter++;

  }

});

Cufon.replace('h2');
Cufon.replace('h3');
Cufon.replace('#identyfikacja .button');