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) {
    index_over = newImage("images/index-over.gif");
    services_over = newImage("images/services-over.gif");
    photos_over = newImage("images/photos-over.gif");
    faqs_over = newImage("images/faqs-over.gif");
    contact_over = newImage("images/contact-over.gif");
    preloadFlag = true;
  }
}

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) {
    index_bot_over = newImage("images/index_bot-over.gif");
    services_bot_over = newImage("images/services_bot-over.gif");
    photos_bot_over = newImage("images/photos_bot-over.gif");
    faqs_bot_over = newImage("images/faqs_bot-over.gif");
    contact_bot_over = newImage("images/contact_bot-over.gif");
    preloadFlag = true;
  }
}