var homeoff = new Image();
  homeoff.src = "images/home-off.gif";
  var homeon = new Image();
  homeon.src = "images/home-on.gif";

  var aboutoff = new Image();
  aboutoff.src = "images/about-off.gif";
  var abouton = new Image();
  abouton.src = "images/about-on.gif";

  var joinoff = new Image();
  joinoff.src = "images/join-off.gif";
  var joinon = new Image();
  joinon.src = "images/join-on.gif";

  var chiefsoff = new Image();
  chiefsoff.src = "images/chiefs-off.gif";
  var chiefson = new Image();
  chiefson.src = "images/chiefs-on.gif";

  var co1off = new Image();
  co1off.src = "images/company1-off.gif";
  var co1on = new Image();
  co1on.src = "images/company1-on.gif";

  var co2off = new Image();
  co2off.src = "images/company2-off.gif";
  var co2on = new Image();
  co2on.src = "images/company2-on.gif";

  var co3off = new Image();
  co3off.src = "images/company3-off.gif";
  var co3on = new Image();
  co3on.src = "images/company3-on.gif";

  var co4off = new Image();
  co4off.src = "images/company4-off.gif";
  var co4on = new Image();
  co4on.src = "images/company4-on.gif";

  var co5off = new Image();
  co5off.src = "images/company5-off.gif";
  var co5on = new Image();
  co5on.src = "images/company5-on.gif";

  var probationaryoff = new Image();
  probationaryoff.src = "images/probationary-off.gif";
  var probationaryon = new Image();
  probationaryon.src = "images/probationary-on.gif";

  var musteroff = new Image();
  musteroff.src = "images/muster-team-off.gif";
  var musteron = new Image();
  musteron.src = "images/muster-team-on.gif";

  var calendaroff = new Image();
  calendaroff.src = "images/calendar-off.gif";
  var calendaron = new Image();
  calendaron.src = "images/calendar-on.gif";

  var galleryoff = new Image();
  galleryoff.src = "images/gallery-off.gif";
  var galleryon = new Image();
  galleryon.src = "images/gallery-on.gif";

  var safetyoff = new Image();
  safetyoff.src = "images/safety-off.gif";
  var safetyon = new Image();
  safetyon.src = "images/safety-on.gif";

  var guestoff = new Image();
  guestoff.src = "images/guest-book-off.gif";
  var gueston = new Image();
  gueston.src = "images/guest-book-on.gif";

  var ferndaleoff = new Image();
  ferndaleoff.src = "images/ferndale-off.gif";
  var ferndaleon = new Image();
  ferndaleon.src = "images/ferndale-on.gif";


var isMenuAct = false; // the menu is not active yet

function actMenuItem(imgName) {
  isMenuAct = true; // the menu is now active
  act(imgName);
  inact(defImg);
}

function inactMenuItem(imgName) {
  isMenuAct = false; // the menu is no longer active
  if (document.images) {
    inact(imgName);
    timerID = setTimeout('if (!isMenuAct) act("' +  defImg + '")', 100);
  }
}

function act(imgName) {
  if (document.images) 
    document[imgName].src = eval(imgName + "on.src");
}

function inact(imgName) {
  if (document.images)
    document[imgName].src = eval(imgName + "off.src");
}