if (navigator.appVersion.indexOf("2.") != -1){
          check = false;
          }
  if ((navigator.appVersion.indexOf("3.") != -1) &&
(navigator.appName.indexOf("Explorer") != -1)){
          check = false;
          }
  else {
          check = true;
          }
  if (check == true){
          image1 = new Image();
          image1.src = "../img/pfeil_off.gif";
          image1on = new Image();
          image1on.src = "../img/pfeil_aktiv_unterkat.gif";
          image1stay = new Image();
          image1stay.src = "../img/pfeil_aktiv_unterkat.gif";
          image2 = new Image();
          image2.src = "../img/pfeil_off.gif";
          image2on = new Image();
          image2on.src = "../img/pfeil_aktiv_unterkat.gif";
          image2stay = new Image();
          image2stay.src = "../img/pfeil_aktiv_unterkat.gif"; 
          image3 = new Image();
          image3.src = "../img/pfeil_off.gif";
          image3on = new Image();
          image3on.src = "../img/pfeil_aktiv_unterkat.gif";
          image3stay = new Image();
          image3stay.src = "../img/pfeil_aktiv_unterkat.gif";   
          image4 = new Image();
          image4.src = "../img/pfeil_off.gif";
          image4on = new Image();
          image4on.src = "../img/pfeil_aktiv_unterkat.gif";
          image4stay = new Image();
          image4stay.src = "../img/pfeil_aktiv_unterkat.gif";       
          image5 = new Image();
          image5.src = "../img/pfeil_off.gif";
          image5on = new Image();
          image5on.src = "../img/pfeil_aktiv_unterkat.gif";
          image5stay = new Image();
          image5stay.src = "../img/pfeil_aktiv_unterkat.gif";                                   
          image6 = new Image();
          image6.src = "../img/pfeil_off.gif";
          image6on = new Image();
          image6on.src = "../img/pfeil_aktiv_unterkat.gif";
          image6stay = new Image();
          image6stay.src = "../img/pfeil_aktiv_unterkat.gif";      
          image7 = new Image();
          image7.src = "../img/pfeil_off.gif";
          image7on = new Image();
          image7on.src = "../img/pfeil_aktiv_unterkat.gif";
          image7stay = new Image();
          image7stay.src = "../img/pfeil_aktiv_unterkat.gif";  
          image8 = new Image();
          image8.src = "../img/pfeil_off.gif";
          image8on = new Image();
          image8on.src = "../img/pfeil_aktiv_unterkat.gif";
          image8stay = new Image();
          image8stay.src = "../img/pfeil_aktiv_unterkat.gif"; 
          image9 = new Image();
          image9.src = "../img/pfeil_off.gif";
          image9on = new Image();
          image9on.src = "../img/pfeil_aktiv_unterkat.gif";
          image9stay = new Image();
          image9stay.src = "../img/pfeil_aktiv_unterkat.gif"; 
          image10 = new Image();
          image10.src = "../img/pfeil_off.gif";
          image10on = new Image();
          image10on.src = "../img/pfeil_aktiv_unterkat.gif";
          image10stay = new Image();
          image10stay.src = "../img/pfeil_aktiv_unterkat.gif"; 
          image11 = new Image();
          image11.src = "../img/pfeil_off.gif";
          image11on = new Image();
          image11on.src = "../img/pfeil_aktiv_unterkat.gif";
          image11stay = new Image();
          image11stay.src = "../img/pfeil_aktiv_unterkat.gif";                                             

  }
  imageStay = ""
  function imageon(name){
          if (imageStay != name){
                  document[name].src = eval(name + "on.src");
          }
  }
  function imageoff(name){
          if (imageStay != name){
                  document[name].src = eval(name + ".src");
          }
  }
  function on(name){
          if (check == true){
          imageon(name);
          }
  }
  function off(name){
          if (check == true){
          imageoff(name);
          }
  }
  function stay(name){
          if (check == true){
          document[name].src = eval(name + "stay.src");
          if (imageStay != name){
                  if (imageStay != ""){
                          document[imageStay].src = eval(imageStay + ".src");
                  }
          }
          imageStay = name
          }
  }