if (document.images) {
  img1 = new Image;
  img2 = new Image;
  img3 = new Image;
  img4 = new Image;
  img5 = new Image;
  img6 = new Image;
  
  img1.src = '../photos/rn_1.jpg';
  img2.src = '../photos/rn_2.jpg';
  img3.src = '../photos/rn_3.jpg';
  img4.src = '../photos/rn_4.jpg';
  img5.src = '../photos/rn_5.jpg';
  img6.src = '../photos/rn_6.jpg';
   
} else {
  img1 = '';
  img2 = '';
  img3 = '';
  img4 = '';
  img5 = '';
  img6 = '';
     
  document.rollimg = '';
}