if(document.images) {
pics = new Array();
pics[1] = new Image();
pics[1].src = "images/pic1.jpg";
pics[2] = new Image();
pics[2].src = "images/pic2.jpg";
pics[3] = new Image();
pics[3].src = "images/pic3.jpg";
pics[4] = new Image();
pics[4].src = "images/pic4.jpg";
pics[5] = new Image();
pics[5].src = "images/pic5.jpg";
pics[6] = new Image();
pics[6].src = "images/pic6.jpg";
pics[7] = new Image();
pics[7].src = "images/pic7.jpg";
pics[8] = new Image();
pics[8].src = "images/pic8.jpg";
pics[9] = new Image();
pics[9].src = "images/pic9.jpg";
pics[10] = new Image();
pics[10].src = "images/pic10.jpg";
pics[11] = new Image();
pics[11].src = "images/pic11.jpg";
pics[12] = new Image();
pics[12].src = "images/pic12.jpg";
pics[13] = new Image();
pics[13].src = "images/pic13.jpg";
pics[14] = new Image();
pics[14].src = "images/pic14.jpg";
pics[15] = new Image();
pics[15].src = "images/pic15.jpg";
pics[16] = new Image();
pics[16].src = "images/pic16.jpg";
}
  function changer(from,to) {
  if(document.images) {
  document.images[from].src = pics[to].src;
    }
  }