if (document.images)
{
  preload_image_object = new Image();
  // set image url
  image_url = new Array();
  image_url[0] = "../_images/get_started_now_hvr.gif";
  image_url[1] = "../_images/mailing_list_hvr.gif";
  image_url[2] = "../_images/btn_download_now_hvr.jpg";
  image_url[3] = "../_images/btn_download_now_dn.jpg";
  image_url[4] = "../_images/btn_submit_dn.jpg";
  image_url[5] = "../_images/btn_submit_hvr.jpg";
   var i = 0;
   for(i=0; i<=5; i++) 
	 preload_image_object.src = image_url[i];
}