var config_url = '/movie-stuff.nl/';

var prevImg  = '';
var prevName = '';

var imgIndex = new Array();
function preloadImage(img_name,img_src) {
  imgIndex[img_name] = new Image();
  imgIndex[img_name].src = img_src;
}

function swapImg(img_name,img_src) {
  prevName = img_name;
  prevImg  = document[img_name].src;
  if (imgIndex[img_name]) {
    document[img_name].src = imgIndex[img_name].src;
  } else {
    document[img_name].src = img_src;
  }
}

function swapImgRestore() {
  document[prevName].src = prevImg;
}

function doPreload() {
  preloadImage('MENU-01',config_url + 'images/menu/MENU-01-over.gif');
  preloadImage('MENU-02',config_url + 'images/menu/MENU-02-over.gif');
  preloadImage('MENU-03',config_url + 'images/menu/MENU-03-over.gif');
  preloadImage('MENU-04',config_url + 'images/menu/MENU-04-over.gif');
  preloadImage('MENU-05',config_url + 'images/menu/MENU-05-over.gif');
}

function swapImgPrijsvraag(img_src) {
  document['IMGPrijs'].src = img_src;
}