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) {
    menu_label_home_over = newImage("images/menu_label_home_over_en.gif");
    menu_label_company_over = newImage("images/menu_label_company_over_en.gif");
    menu_label_products_over = newImage("images/menu_label_products_over_en.gif");
    menu_label_pricelist_over = newImage("images/menu_label_pricelist_over-en.gif");
    menu_label_contact_over = newImage("images/menu_label_contact_over_en.gif");
    menu_label_sellrules_over = newImage("images/menu_label_sellrules_over_en.gif");
    menu_label_specials_over = newImage("images/menu_label_specials_over_en.gif");
    
 
    preloadFlag = true;
  }
}