function random_imglink(){
  var img=new Array()
  img[1]="images/NewBanners/topbanner.jpg"
  img[2]="images/Newbanners/topbanner1.jpg"
  img[3]="images/Newbanners/topbanner2.jpg"
  img[4]="images/NewBanners/topbanner3.jpg"


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

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

  random_imglink()