var imglist = new Array(
      "./rand_images/rand_1.gif",
      "./rand_images/rand_2.gif",
      "./rand_images/rand_3.gif",
      "./rand_images/rand_4.gif",
      "./rand_images/rand_5.gif",
      "./rand_images/rand_6.gif",
      "./rand_images/rand_7.gif",
      "./rand_images/rand_8.gif" 
	);
   var selectnum = Math.floor((Math.random() * 100)) % imglist.length;
   var output = "<img src=" + imglist[selectnum] + " width=120 height=60>";
   document.write(output);