if (document.images) {
  image1 = new Image;
  image2 = new Image;
  image3 = new Image;
  image4 = new Image;
  image5 = new Image;
  image6 = new Image;
  image7 = new Image;
  image8 = new Image;
  image1.src = 'images/2008_nissan/nissan01.jpg';
  image2.src = 'images/2008_nissan/nissan02.jpg';
  image3.src = 'images/2008_nissan/nissan03.jpg';
  image4.src = 'images/2008_nissan/nissan04.jpg';
  image5.src = 'images/2008_nissan/nissan05.jpg';
  image6.src = 'images/2008_nissan/nissan06.jpg';
  image7.src = 'images/2008_nissan/nissan07.jpg';
  image8.src = 'images/2008_nissan/nissan08.jpg';
} else {
  image1 = '';
  image2 = '';
  image3 = '';
  image4 = '';
  image5 = '';
  image6 = '';
  image7 = '';
  image8 = '';
  document.rollimg = '';
}