function changeview(obj){
  document.getElementById('div1').style.display = "none";
  document.getElementById('div2').style.display = "none";
  document.getElementById('div3').style.display = "none";
  switch(obj.value){
    case '0':
      document.getElementById('div1').style.display = "block";
      break;
    case '1':
      document.getElementById('div2').style.display = "block";
      break;
    case '2':
      document.getElementById('div3').style.display = "block";
      break;
  }
};

function installBFCalendar() {
  var year = new Date().getFullYear();
  var allowedChars = ['0','1','2','3','4','5','6','7','8','9','.'];

  Calendar.setup({"inputDisplayArea":"bf_anreise",
                  "inputField":"bf_anreise",
                  "button":"bf_anreise_btn",
                  "range":[year,year+2]
  });
  (new secra.InputFilter(allowedChars, "bf_anreise"));

  Calendar.setup({"inputDisplayArea":"bf_abreise",
                  "inputField":"bf_abreise",
                  "button":"bf_abreise_btn",
                  "range":[year,year+2]
  });
  (new secra.InputFilter(allowedChars, "bf_abreise"));

  Calendar.setup({"inputDisplayArea":"bf_anreise_ersatz",
                  "inputField":"bf_anreise_ersatz",
                  "button":"bf_anreise_ersatz_btn",
                  "range":[year,year+2]
  });
  (new secra.InputFilter(allowedChars, "bf_anreise_ersatz"));

  Calendar.setup({"inputDisplayArea":"bf_abreise_ersatz",
                  "inputField":"bf_abreise_ersatz",
                  "button":"bf_abreise_ersatz_btn",
                  "range":[year,year+2]
  });
  (new secra.InputFilter(allowedChars, "bf_abreise_ersatz"));
};

Handler.add(window, 'load', installBFCalendar);