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) {
    nav_savings_deposits_o = newImage("images/nav-savings-deposits-o.gif");
    nav_loans_mortgages_o = newImage("images/nav-loans-mortgages-o.gif");
    nav_debit_credit_o = newImage("images/nav-debit-credit-o.gif");
    nav_bankingservices_o = newImage("images/nav-bankingservices-o.gif");
    nav_businessbanking_o = newImage("images/nav-businessbanking-o.gif");
    nav_privatebanking_o = newImage("images/nav-privatebanking-o.gif");
    nav_investmentservices_o = newImage("images/nav-investmentservices-o.gif");
    nav_trustservices_o = newImage("images/nav-trustservices-o.gif");
    nav_managementservices_o = newImage("images/nav-managementservices-o.gif");
    nav_yourbanking_o = newImage("images/nav-yourbanking-o.gif");
    nav_yourinvestments_o = newImage("images/nav-yourinvestments-o.gif");
    nav_yourwealth_o = newImage("images/nav-yourwealth-o.gif");
    nav_currentrates_o = newImage("images/nav-currentrates-o.gif");
    nav_financialtools_o = newImage("images/nav-financialtools-o.gif");
    nav_documents_forms_o = newImage("images/nav-documents-forms-o.gif");
    nav_corporateinfo_o = newImage("images/nav-corporateinfo-o.gif");
    nav_contactinfo_o = newImage("images/nav-contactinfo-o.gif");
    nav_privacy_o = newImage("images/nav-privacy-o.gif");
    nav_Annual_Reports_o = newImage("images/nav-Annual-reports-o.gif");
    nav_shop_o = newImage("images/nav-shop-o.gif");
    preloadFlag = true;
  }
}