if (document.images) {

   oneOn = new Image  

   twoOn = new Image  

   threeOn = new Image  

   fourOn = new Image  

   fiveOn = new Image  
 
   bgOn = new Image


   oneOn.src = "images/one_on.jpg"

   twoOn.src = "images/two_on.jpg"

   threeOn.src = "images/three_on.jpg"

   fourOn.src = "images/four_on.jpg"

   fiveOn.src = "images/five_on.jpg"
 
   bgOn.src = "images/port_image.jpg"

}

else {

  oneOn = ""

  twoOn = ""

  threeOn = ""

  fourOn = ""

  fiveOn = ""

  bgOn = ""

  document.imgField = ""

}