if (document.images) {
  image1 = new Image;
  image2 = new Image;
  image3 = new Image;
  image1.src = '../images\/act5.gif';
  image2.src = '../images\/act6.gif';
  image3.src = '../images\/act7.gif';
} else {
  image1 = '';
  image2 = '';
  image3 = '';
  document.rollimg1 = '';
}