browser = (((navigator.appName == "Netscape") && (parseInt (navigator.appVersion) >= 3 )) ||
             ((navigator.appName == "Microsoft Internet Explorer") && (parseInt (navigator.appVersion) >= 4)))

  if (browser)
    {
      normal = new MakeArray(25)
      over = new MakeArray(25)

      normal[1].src = "images/menu/home.jpg"

      over[1].src = "images/menu/home-on.jpg"
    }

  function MakeArray(n)
    {
      this.length = n
      for (var i = 0; i<=n; i++)
        {
          this[i] = new Image()
        }
      return this
    }

  function msover(buttonname)
    {
      if (browser)
        {
          var imageobject = new Image()

          imageobjectname = "document.images." + buttonname
          imagename = "images/menu/" + buttonname + "-on.jpg"
          imageobject = eval(imageobjectname)
          imageobject.src = imagename
        }
    }

  function msout(buttonname)
    {
      if (browser)
        {
          var imageobject = new Image()

          imageobjectname = "document.images." + buttonname
          imagename = "images/menu/" + buttonname + ".jpg"
          imageobject = eval(imageobjectname)
          imageobject.src = imagename
        }
    }

  function msoverp(buttonname)
    {
      if (browser)
        {
          var imageobject = new Image()

          imageobjectname = "document.images." + buttonname
          imagename = "images/pests/" + buttonname + "-on.jpg"
          imageobject = eval(imageobjectname)
          imageobject.src = imagename
        }
    }

  function msoutp(buttonname)
    {
      if (browser)
        {
          var imageobject = new Image()

          imageobjectname = "document.images." + buttonname
          imagename = "images/pests/" + buttonname + ".jpg"
          imageobject = eval(imageobjectname)
          imageobject.src = imagename
        }
    }

  function msoverb(buttonname)
    {
      if (browser)
        {
          var imageobject = new Image()

          imageobjectname = "document.images." + buttonname
          imagename = "images/buttons/" + buttonname + "-on.jpg"
          imageobject = eval(imageobjectname)
          imageobject.src = imagename
        }
    }

  function msoutb(buttonname)
    {
      if (browser)
        {
          var imageobject = new Image()

          imageobjectname = "document.images." + buttonname
          imagename = "images/buttons/" + buttonname + ".jpg"
          imageobject = eval(imageobjectname)
          imageobject.src = imagename
        }
    }