if (document.images)
    {
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "/images/img01.jpg";
      image_url[1] = "/images/text-news.gif";
      image_url[2] = "/images/bg-news-box.gif";
	  image_url[3] = "/images/text1.gif";
	  image_url[4] = "/images/text1-hover.gif";
	  image_url[5] = "/images/text2.gif";
	  image_url[6] = "/images/text2-hover.gif";
	  image_url[7] = "/images/text3.gif";
	  image_url[8] = "/images/text3-hover.gif";
	  image_url[9] = "/images/text4.gif";
	  image_url[10] = "/images/text4-hover.gif";
	  image_url[11] = "/images/text5.gif";
	  image_url[12] = "/images/text5-hover.gif";
      image_url[13] = "/images/banner_audit-v2.jpg";
      image_url[14] = "/images/banner_pen_test2-v2.jpg";
      image_url[15] = "/images/banner_data_forensics-v2.jpg";
      image_url[16] = "/images/banner_training-v2.jpg";
	  
       var i = 0;
       for(i=0; i<=12; i++) 
         preload_image_object.src = image_url[i];
    }