// preload images

    if (document.images)
    {
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "http://www.cybercityadventures.com/images/cybercity-nav-over_01.gif";
      image_url[1] = "http://www.cybercityadventures.com/images/cybercity-nav-over_02.gif";
      image_url[2] = "http://www.cybercityadventures.com/images/cybercity-nav-over_03.gif";
      image_url[3] = "http://www.cybercityadventures.com/images/cybercity-nav-over_04.gif";
	  image_url[4] = "http://www.cybercityadventures.com/images/cybercity-nav-over_05.gif";
	  image_url[5] = "http://www.cybercityadventures.com/images/cybercity-nav-over_06.gif";
	  image_url[6] = "http://www.cybercityadventures.com/images/cybercity-nav-over_07.gif";
	  image_url[7] = "http://www.cybercityadventures.com/images/cybercity-nav-over_08.gif";
	  image_url[8] = "http://www.cybercityadventures.com/images/cybercity-nav-over_09.gif";
	  image_url[9] = "http://www.cybercityadventures.com/images/cybercity-nav-over_10.gif";
	  image_url[10] = "http://www.cybercityadventures.com/images/cybercity-nav-over_11.gif";
	  image_url[11] = "http://www.cybercityadventures.com/images/cybercity-nav-over_12.gif";
	  image_url[12] = "http://www.cybercityadventures.com/images/cybercity-nav-over_13.gif";
	  image_url[13] = "http://www.cybercityadventures.com/images/cybercity-nav-over_14.gif";
	  image_url[14] = "http://www.cybercityadventures.com/images/cybercity-nav-over_15.gif";
	  image_url[15] = "http://www.cybercityadventures.com/images/cybercity-nav-over_16.gif";
	  image_url[16] = "http://www.cybercityadventures.com/images/cybercity-nav-over_17.gif";
	  image_url[17] = "http://www.cybercityadventures.com/images/cybercity-nav-over_18.gif";
      image_url[18] = "http://www.cybercityadventures.com/images/headerbg.gif";
      var i = 0;
       for(i=0; i<=5; i++) 
         preload_image_object.src = image_url[i];
    }