function random_imglink(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish images\headers\home-banner
  myimages[1]="images/headers/home-banner/banner-1.jpg"
  myimages[2]="images/headers/home-banner/banner-2.jpg"
  myimages[3]="images/headers/home-banner/banner-3.jpg"


  //specify corresponding links below
  var imagelinks=new Array()
  imagelinks[1]="interactive-response-system/classcomm.php"
  imagelinks[2]="interactive-whiteboards-geneeBoard/genee-board.php"
  imagelinks[3]="visualiser/visualiser-genee-vision.php"
 

  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>')
}