function image() { }; 
   image = new image();
   number = 0; 
   // imageArray
image[number++] = "<img src='images/top1.jpg' border='0' alt=''>"
image[number++] = "<img src='images/top2.jpg' border='0' alt=''>"
image[number++] = "<img src='images/top3.jpg' border='0' alt=''>"
image[number++] = "<img src='images/top4.jpg' border='0' alt=''>"
image[number++] = "<img src='images/top5.jpg' border='0' alt=''>"
increment = Math.floor(Math.random() * number);  document.write(image[increment]);