if (document.images) {
  image1on = new Image();
  image1on.src = "images/Strona1_a_03.gif";
  image2on = new Image();
  image2on.src = "images/Strona1_a_02.gif";
  image3on = new Image();
  image3on.src = "images/Strona1_a_04.gif";
  image4on = new Image();
  image4on.src = "images/Strona0_a_02.gif";
  image5on = new Image();
  image5on.src = "images/Strona0_a_03.gif";
  image6on = new Image();
  image6on.src = "images/Strona0_a_04.gif";
  image7on = new Image();
  image7on.src = "images/Strona1_a_05.gif";
  image8on = new Image();
  image8on.src = "images/Strona1_a_06.gif";
  image9on = new Image();
  image9on.src = "images/Strona1_a_07.gif";
  image10on = new Image();
  image10on.src = "images/Strona1_a_09.gif";
  image11on = new Image();
  image11on.src = "portfolio_on_shdw2.jpg";

  image1off = new Image();
  image1off.src = "images/Strona1_03.gif";
  image2off = new Image();
  image2off.src = "images/Strona1_02.gif";
  image3off = new Image();
  image3off.src = "images/Strona1_04.gif";
  image4off = new Image();
  image4off.src = "images/Strona0_02.gif";
  image5off = new Image();
  image5off.src = "images/Strona0_03.gif";
  image6off = new Image();
  image6off.src = "images/Strona0_04.gif";
  image7off = new Image();
  image7off.src = "images/Strona1_05.gif";
  image8off = new Image();
  image8off.src = "images/Strona1_06.gif";
  image9off = new Image();
  image9off.src = "images/Strona1_07.gif";
  image10off = new Image();
  image10off.src = "images/Strona1_09.gif";
  image11off = new Image();
  image11off.src = "portfolio_shdw2.jpg";


}
function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}