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) {
    hm_home_over = newImage("images/hm_home_over.gif");
    hm_history_over = newImage("images/hm_history_over.gif");
    hm_prestige_over = newImage("images/hm_prestige_over.gif");
    hm_choosing_over = newImage("images/hm_choosing_over.gif");
    hm_contactus_over = newImage("images/hm_contactus_over.gif");
    hm_francais_over = newImage("images/hm_francais_over.gif");
    hm_position_over = newImage("images/hm_position_over.gif");
    hm_paper_over = newImage("images/hm_paper_over.gif");
    hm_quantities_over = newImage("images/hm_quantities_over.gif");
    hm_order_over = newImage("images/hm_order_over.gif");
		preloadFlag = true;
  }
}