function random_imglink(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish
  myimages[1]="/images/main_template/header-image1-top.jpg"
  myimages[2]="/images/main_template/header-image2-top.jpg"
  myimages[3]="/images/main_template/header-image3-top.jpg"


  //specify corresponding links below
  var imagelinks=new Array()
  imagelinks[1]="/products/led/index.html"
  imagelinks[2]="/products/air_auto_brick/index.html"
  imagelinks[3]="/products/custom/index.html"


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

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

  random_imglink()