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(40,40);
		pic1on.src="http://www.parkenet.org/jp/images/t1.jpg";  
     	pic2on=new Image(40,40);
		pic2on.src="http://www.parkenet.org/jp/images/t2.jpg";
	pic3on=new Image(40,40);
		pic3on.src="http://www.parkenet.org/jp/images/t3.jpg";
	pic4on=new Image(40,40);
		pic4on.src="http://www.parkenet.org/jp/images/t4.jpg";
	pic5on=new Image(40,40);
		pic5on.src="http://www.parkenet.org/jp/images/t5.jpg";
	pic6on=new Image(40,40);
		pic6on.src="http://www.parkenet.org/jp/images/t6.jpg";
	pic7on=new Image(40,40);
		pic7on.src="http://www.parkenet.org/jp/images/t7.jpg";
	pic8on=new Image(40,40);
		pic8on.src="http://www.parkenet.org/jp/images/t8.jpg";



	pic1off=new Image(40,40);
		pic1off.src="http://www.parkenet.org/jp/images/ft1.jpg";
	pic2off=new Image(40,40);
		pic2off.src="http://www.parkenet.org/jp/images/ft2.jpg";
	pic3off=new Image(40,40);
		pic3off.src="http://www.parkenet.org/jp/images/ft3.jpg";
	pic4off=new Image(40,40);
		pic4off.src="http://www.parkenet.org/jp/images/ft4.jpg";
	pic5off=new Image(40,40);
		pic5off.src="http://www.parkenet.org/jp/images/ft5.jpg";
	pic6off=new Image(40,40);
		pic6off.src="http://www.parkenet.org/jp/images/ft6.jpg";
	pic7off=new Image(40,40);
		pic7off.src="http://www.parkenet.org/jp/images/ft7.jpg";
	pic8off=new Image(40,40);
		pic8off.src="http://www.parkenet.org/jp/images/ft8.jpg";


   }

function lightup(imgName)
 {
   if (version=="n3")
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (version=="n3")
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }