arImages=new Array(
 
  "images/edint1.jpg",
  "images/edint2.jpg",
  "images/edint3.jpg",
  "images/edint4.jpg",
  "images/edint5.jpg"
);

rand=Math.floor(arImages.length*Math.random());
document.write('<img src="'+arImages[rand]+'" width="177" height="260" alt="Storytelling">');