if (document.images)
{

  image1on = new Image();
  image1on.src="/images/photos/gallery_main/newyork_100_mouse.jpg";
  image1off = new Image();
  image1off.src="/images/photos/gallery_main/newyork_100.jpg";

  image2on = new Image();
  image2on.src="/images/photos/gallery_main/mexicoDF_100_mouse.jpg";
  image2off = new Image();
  image2off.src="/images/photos/gallery_main/mexicoDF_100.jpg";

  image4on = new Image();
  image4on.src="/images/photos/gallery_main/france_100_mouse.jpg";
  image4off = new Image();
  image4off.src="/images/photos/gallery_main/france_100.jpg";

  image5on = new Image();
  image5on.src="/images/photos/gallery_main/airport_100_mouse.jpg";
  image5off = new Image();
  image5off.src="/images/photos/gallery_main/airport_100.jpg";

  image6on = new Image();
  image6on.src="/images/photos/gallery_main/kuala_100_mouse.jpg";
  image6off = new Image();
  image6off.src="/images/photos/gallery_main/kuala_100.jpg";

  image7on = new Image();
  image7on.src="/images/photos/gallery_main/jungle_100_mouse.jpg";
  image7off = new Image();
  image7off.src="/images/photos/gallery_main/jungle_100.jpg";

  image8on = new Image();
  image8on.src="/images/photos/gallery_main/malakka_100_mouse.jpg";
  image8off = new Image();
  image8off.src="/images/photos/gallery_main/malakka_100.jpg";

  image9on = new Image();
  image9on.src="/images/photos/gallery_main/venice_100_mouse.jpg";
  image9off = new Image();
  image9off.src="/images/photos/gallery_main/venice_100.jpg";
  
  image10on = new Image();
  image10on.src="/images/photos/gallery_main/verona_100_mouse.jpg";
  image10off = new Image();
  image10off.src="/images/photos/gallery_main/verona_100.jpg";
  
  image11on = new Image();
  image11on.src="/images/photos/gallery_main/brittish_100_mouse.jpg";
  image11off = new Image();
  image11off.src="/images/photos/gallery_main/brittish_100.jpg";

  image12on = new Image();
  image12on.src="/images/photos/gallery_main/docklands_100_mouse.jpg";
  image12off = new Image();
  image12off.src="/images/photos/gallery_main/docklands_100.jpg";
  
  image13on = new Image();
  image13on.src="/images/photos/gallery_main/oxford_100_mouse.jpg";
  image13off = new Image();
  image13off.src="/images/photos/gallery_main/oxford_100.jpg";        
  
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}