arImages=new Array(
  "http://www.utmem.edu/molecular_sciences/images/rotatingimages/building.jpg",
  "http://www.utmem.edu/molecular_sciences/images/rotatingimages/image1.jpg",
  "http://www.utmem.edu/molecular_sciences/images/rotatingimages/image2a.jpg",
  "http://www.utmem.edu/molecular_sciences/images/rotatingimages/image2b.jpg",
  "http://www.utmem.edu/molecular_sciences/images/rotatingimages/image2c.jpg",
  "http://www.utmem.edu/molecular_sciences/images/rotatingimages/image3.jpg"
 );

rand=Math.floor(arImages.length*Math.random());
document.write('<img src="'+arImages[rand]+'" width="233" alt="Rotating Photos">');