if (document.images)
{
  preload_image_object = new Image();
  // set image url
  image_url = new Array();
  image_url[0] = "images/nav_home_f2.jpg";
  image_url[1] = "images/nav_team_f2.jpg";
  image_url[2] = "images/nav_services_f2.jpg";
  image_url[3] = "images/nav_specials_f2.jpg";
  image_url[4] = "images/nav_testimonials_f2.jpg";
  image_url[5] = "images/nav_brochure_f2.jpg";
  image_url[6] = "images/nav_contact_f2.jpg";

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