// JavaScript Document

if (document.images) {
  var defImg = "nav";

  var nav1 = new Image();
  nav1.src = "_images/nav1.jpg";
  var nav1h = new Image();
  nav1h.src = "_images/nav1h.jpg";
  var nav2 = new Image();
  nav2.src = "_images/nav2.jpg";
  var nav2h = new Image();
  nav2h.src = "_images/nav2h.jpg";
  var nav3 = new Image();
  nav3.src = "_images/nav3.jpg";
  var nav3h = new Image();
  nav3h.src = "_images/nav3h.jpg";
  var nav4 = new Image();
  nav4.src = "_images/nav4.jpg";
  var nav4h = new Image();
  nav4h.src = "_images/nav4h.jpg";
  var nav5 = new Image();
  nav5.src = "_images/nav5.jpg";
  var nav5h = new Image();
  nav5h.src = "_images/nav5h.jpg";
}

function actMenuItem(imgName) {
  act(imgName);
  inact(defImg);
}

function inactMenuItem(imgName) {
  inact(imgName);
  act(defImg);
}

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

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