function random_imglink(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish
  myimages[1]="/images/main_image/mainimage.jpg"
  myimages[2]="/images/main_image/main_image02.jpg"
  myimages[3]="/images/main_image/main_image03.jpg"
	
	var ry=Math.floor(Math.random()*myimages.length)

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