function random_imglink(){
  var img=new Array()
  img[1]="images/headers/small_header1.jpg"
  img[2]="images/headers/small_header2.jpg"
  img[3]="images/headers/small_header3.jpg"
  img[4]="images/headers/small_header4.jpg"

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

  if (ry==0)
     ry=1
     document.write('<img src="'+img[ry]+'" border="0" style="margin:0; padding:0;"/>')
}

  random_imglink()