function random_imglink(){
  var myimages=new Array()
myimages[1]="images/thumb/House01.jpg"
myimages[2]="images/thumb/House02.jpg"

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

  if (ry==0)
     ry=1
     document.write('<img src="'+myimages[ry]+'" height=99 with=154 border=1 alt="">')
}

  random_imglink()