if (document.images)
{
  preload_image_object = new Image();
  // set image url
  image_url = new Array();
  image_url[0] = "/images/img_home_01.jpg";
  image_url[1] = "/images/img_whoweare.jpg";
  image_url[2] = "/images/img_howwework.jpg";
  image_url[3] = "/images/img_contact.jpg";
  image_url[4] = "/images/logo_home.gif";
  image_url[5] = "/images/nav_about_on.gif";
  image_url[6] = "/images/nav_projects_on.gif";
  image_url[7] = "/images/nav_chez_catherine_on.gif";
  image_url[8] = "/images/nav_press_on.gif";
  image_url[9] = "/images/nav_contact_on.gif";
  image_url[10] = "/images/snav_whoweare_on.gif";
  image_url[11] = "/images/snav_howwework_on.gif";
  

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