<!--
browserName=navigator.appName; 
browserVer=parseInt(navigator.appVersion);

  if ((browserName=="Netscape" && browserVer>=3) || (browserName=="Microsoft Internet Explorer" && browserVer>=4))    
  version="n3";
  else
    version="n2";

  if (version=="n3")
   {
  pic1on = new Image();
  pic1on.src = "index_files/navihome2.gif";
  pic2on = new Image();
  pic2on.src = "index_files/naviabout2.gif";
  pic3on = new Image();
  pic3on.src = "index_files/naviport2.gif";
  pic4on = new Image();
  pic4on.src = "index_files/navitut2.gif";
  pic5on = new Image();
  pic5on.src = "index_files/navilinks2.gif";
  pic6on = new Image();
  pic6on.src = "index_files/navitop2.gif"; 
  pic7on = new Image();
  pic7on.src = "index_files/navibook2.gif";
  pic8on = new Image();
  pic8on.src = "index_files/navicontact2.gif"; 
  pic9on = new Image();
  pic9on.src = "index_files/navirest2.gif";
  pic10on = new Image();
  pic10on.src = "index_files/navipics2.gif";

  pic1off = new Image();
  pic1off.src = "index_files/navihome1.gif";
  pic2off = new Image();
  pic2off.src = "index_files/naviabout1.gif";
  pic3off = new Image();
  pic3off.src = "index_files/naviport1.gif";
  pic4off = new Image();
  pic4off.src = "index_files/navitut1.gif";
  pic5off = new Image();
  pic5off.src = "index_files/navilinks1.gif";
  pic6off = new Image();
  pic6off.src = "index_files/navitop1.gif"; 
  pic7off = new Image();
  pic7off.src = "index_files/navibook1.gif";
  pic8off = new Image();
  pic8off.src = "index_files/navicontact1.gif";
  pic9off = new Image();
  pic9off.src = "index_files/navirest1.gif"; 
  pic10off = new Image();
  pic10off.src = "index_files/navipics1.gif";  
 
  }
function on(imgName)
 {
   if (version=="n3")
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }
function off(imgName)
 {
   if (version=="n3")
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }
//-->