var homeoff = new Image();
  homeoff.src = "images/homeoff.gif";
  var homeon = new Image();
  homeon.src = "images/homeon.gif";

  var kz400off = new Image();
  kz400off.src = "images/kz400off.gif";
  var kz400on = new Image();
  kz400on.src = "images/kz400on.gif";

  var ventureroff = new Image();
  ventureroff.src = "images/ventureroff.gif";
  var ventureron = new Image();
  ventureron.src = "images/ventureron.gif";

  var vision82off = new Image();
  vision82off.src = "images/vision82off.gif";
  var vision82on = new Image();
  vision82on.src = "images/vision82on.gif";

  var vision83off = new Image();
  vision83off.src = "images/vision83off.gif";
  var vision83on = new Image();
  vision83on.src = "images/vision83on.gif";

  var gs550esoff = new Image();
  gs550esoff.src = "images/gs550esoff.gif";
  var gs550eson = new Image();
  gs550eson.src = "images/gs550eson.gif";

  var klr65086off = new Image();
  klr65086off.src = "images/klr65086off.gif";
  var klr65086on = new Image();
  klr65086on.src = "images/klr65086on.gif";

  var katanaoff = new Image();
  katanaoff.src = "images/katanaoff.gif";
  var katanaon = new Image();
  katanaon.src = "images/katanaon.gif";

  var sprintstoff = new Image();
  sprintstoff.src = "images/sprintstoff.gif";
  var sprintston = new Image();
  sprintston.src = "images/sprintston.gif";

  var klx300off = new Image();
  klx300off.src = "images/klx300off.gif";
  var klx300on = new Image();
  klx300on.src = "images/klx300on.gif";

  var lakotaoff = new Image();
  lakotaoff.src = "images/lakotaoff.gif";
  var lakotaon = new Image();
  lakotaon.src = "images/lakotaon.gif";

  var klr65001off = new Image();
  klr65001off.src = "images/klr65001off.gif";
  var klr65001on = new Image();
  klr65001on.src = "images/klr65001on.gif";

  var leftoff = new Image();
  leftoff.src = "images/leftoff.gif";
  var lefton = new Image();
  lefton.src = "images/lefton.gif";

  var rightoff = new Image();
  rightoff.src = "images/rightoff.gif";
  var righton = new Image();
  righton.src = "images/righton.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  isMenuAct = false; // the menu is no longer active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");
}