function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    A1_over = newImage("img/A1_gotha_glow.gif");
    A2_over = newImage("img/A2_prota_glow.gif");
    A3_over = newImage("img/A3_active_glow.gif");
    A4_over = newImage("img/A4_celebr_glow.gif");
    A5_over = newImage("img/A5_ideas_glow.gif");
    A6_over = newImage("img/A6_fails_glow.gif");
    A7_over = newImage("img/A7_tuday_glow.gif");
    Ho_over = newImage("img/home_glow.gif");
    B1_over = newImage("img/B1_origin_glow.gif");
    B2_over = newImage("img/B2_story_glow.gif");
    B3_over = newImage("img/B3_credits_glow.gif");
    B4_over = newImage("img/B4_podcast_glow.gif");
    B5_over = newImage("img/B5_mail_glow.gif");
    B6_over = newImage("img/B6_trasmitted_glow.gif");
		BL_over = newImage("img/blog_glow.gif");
    preloadFlag = true;
  }
}