if (document.images)
{
  preload_image_object = new Image();
  // set image url
  image_url = new Array();
  image_url[0] = "media/images/about-us-roll.gif";
  image_url[1] = "media/images/consultancy-roll.gif";
  image_url[2] = "media/images/contact-us-roll.gif";
  image_url[3] = "media/images/home-roll.gif";
  image_url[4] = "media/images/psycho-roll.gif";
  image_url[5] = "media/images/recruitment-roll.gif";
  image_url[6] = "media/images/training-roll.gif";
  image_url[7] = "media/images/news-roll.gif";

   var i = 0;
   for(i=0; i<=6; i++) 
	 preload_image_object.src = image_url[i];
}