browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
   if ((browserName == "Netscape" && browserVer >= 3)||
       (browserName == "Microsoft Internet Explorer" && browserVer >=4)) version = "n3";
  else version = "x";
  if (version == "n3")
 {    
  new_on = new Image;
  new_on.src = "/img/en/menu_02_on.gif";
  use_on = new Image;
  use_on.src = "/img/en/menu_03_on.gif";
  fin_on = new Image;
  fin_on.src = "/img/en/menu_04_on.gif";
  exc_on = new Image;
  exc_on.src = "/img/en/menu_05_on.gif";
  loc_on = new Image;
  loc_on.src = "/img/en/menu_06_on.gif";
  pri_on = new Image;
  pri_on.src = "/img/en/menu_07_on.gif";
  pro_on = new Image;
  pro_on.src = "/img/en/menu_08_on.gif";
  ser_on = new Image;
  ser_on.src = "/img/en/menu_09_on.gif";
  nos_on = new Image;
  nos_on.src = "/img/en/menu_10_on.gif";

  new_off = new Image;
  new_off.src = "/img/en/menu_02_off.gif";
  use_off = new Image;
  use_off.src = "/img/en/menu_03_off.gif";
  fin_off = new Image;
  fin_off.src = "/img/en/menu_04_off.gif";
  exc_off = new Image;
  exc_off.src = "/img/en/menu_05_off.gif";
  loc_off = new Image;
  loc_off.src = "/img/en/menu_06_off.gif";
  pri_off = new Image;
  pri_off.src = "/img/en/menu_07_off.gif";
  pro_off = new Image;
  pro_off.src = "/img/en/menu_08_off.gif";
  ser_off = new Image;
  ser_off.src = "/img/en/menu_09_off.gif";
  nos_off = new Image;
  nos_off.src = "/img/en/menu_10_off.gif";
}
function img_act(imgName){
  if (version == "n3") 
  {
  imgOn = eval(imgName + "_on.src");
  document [imgName].src = imgOn;
  }
}
function img_inact(imgName){
  if (version == "n3") 
  {
  imgOff = eval(imgName + "_off.src");
  document [imgName].src = imgOff;
  }
}