var browser=0;
var name=navigator.appName;
var version = parseInt(navigator.appVersion); 
if ((name == "Netscape" && version >= 3)||(name =="Microsoft Internet Explorer" &&version==4)) {
  browser = 1;
  
  

  kn1on = new Image(9,9);
  kn1on.src = "image_2/pic_1.gif";
  kn1off = new Image(9,9);
  kn1off.src = "image_2/pic.gif";
  
  kn2on = new Image(9,9);
  kn2on.src = "image_2/pic_1.gif";
  kn2off = new Image(9,9);
  kn2off.src = "image_2/pic.gif";
  
  kn3on = new Image(9,9);
  kn3on.src = "image_2/pic_1.gif";
  kn3off = new Image(9,9);
  kn3off.src = "image_2/pic.gif";

   kn9on = new Image(9,9);
  kn9on.src = "image_2/pic_1.gif";
  kn9off = new Image(9,9);
  kn9off.src = "image_2/pic.gif";
  
  kn8on = new Image(9,9);
  kn8on.src = "image_2/pic_1.gif";
  kn8off = new Image(9,9);
  kn8off.src = "image_2/pic.gif";
  
  kn7on = new Image(9,9);
  kn7on.src = "image_2/pic_1.gif";
  kn7off = new Image(9,9);
  kn7off.src = "image_2/pic.gif";
  
    
  kn5on = new Image(9,9);
  kn5on.src = "image_2/pic_1.gif";
  kn5off = new Image(9,9);
  kn5off.src = "image_2/pic.gif";
}

function switchto(name, on) {
  if (browser == 1) {
    image = eval(name + (on == 1 ? "on.src" : "off.src"));
    document[name].src = image;
  }
}