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.gif"
      normal[2].src = "images/menu/about.gif"
      normal[3].src = "images/menu/services.gif"
      normal[4].src = "images/menu/testimonials.gif"
      normal[5].src = "images/menu/contactus.gif"

      over[1].src = "images/menu/home-on.gif"
      over[2].src = "images/menu/about-on.gif"
      over[3].src = "images/menu/services-on.gif"
      over[4].src = "images/menu/testimonials-on.gif"
      over[5].src = "images/menu/contactus-on.gif"
    }

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

  function msover(num)
    {
      if (browser)
        {
          document.images[num].src = over[num].src
        }
    }

  function msout(num)
    {
      if (browser)
        {
          document.images[num].src = normal[num].src
        }
    }