if (document.images) {
  image0 = new Image;
  image1 = new Image;
  image2 = new Image;
  image3 = new Image;
  image0.src = 'g_gal_0506_upland_tncc_md.jpg';
  image1.src = 'g_gal_0506_upland_srcc_md.jpg';
  image2.src = 'g_gal_0506_upland_tnt_md.jpg';
  image3.src = 'g_gal_0506_uplands_srt_md.jpg';
} else {
  image0 = '';
  image1 = '';
  image2 = '';
  image3 = '';
  document.rollimg = '';
}