function random_imglink(){
  var myimages=new Array()
  myimages[1]="images/1.jpg"
  myimages[2]="images/2.jpg"
  myimages[3]="images/3.jpg"
  myimages[4]="images/4.jpg"

  var imagelinks=new Array()

  var ry=Math.floor(Math.random()*myimages.length)

  if (ry==0)
     ry=1
     document.write('<img src="'+myimages[ry]+'" border=0></a>')
}

  random_imglink()