function activate_mfe() {
 if(document.getElementById) {
   document.getElementById("unterrichtsart_instr").style.visibility = "hidden";
   document.getElementById("unterrichtsart_mfe").style.visibility = "visible";
 }
}

function activate_instr() {
 if(document.getElementById) {
   document.getElementById("unterrichtsart_mfe").style.visibility = "hidden";
   document.getElementById("unterrichtsart_instr").style.visibility = "visible";
 }
}

function init_uart() {
  if (document.forms[0].anmeldung[0].checked) {
    activate_instr();
  }
  else {
    activate_mfe();
  }
}