arImages=new Array(
  "images/tb-all-csc-01.jpg",
  "images/tb-all-csc-02.jpg",
  "images/tb-all-csc-03.jpg",
  "images/tb-all-csc-04.jpg",
  "images/tb-all-csc-05.jpg",
  "images/tb-all-csc-06.jpg",
  "images/tb-all-csc-07.jpg",
  "images/tb-all-csc-08.jpg",
  "images/tb-all-csc-09.jpg",
  "images/tb-all-csc-10.jpg",
  "images/tb-all-csc-11.jpg",
  "images/tb-all-csc-12.jpg",
  "images/tb-all-csc-13.jpg"
);

rand=Math.floor(arImages.length*Math.random());
document.write('<img src="'+arImages[rand]+'" width="519" height="70" alt="CSC Photos">');