<!--

function changeIt(){
  alert("Einen guten Rutsch ins neue Jahr!");
  return true;
}
//try to check if mail-address is valid
function checkMail(mailfield) {
    var mail    = $F(mailfield) || '';
    var pattern = /[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/i;
    return pattern.test(mail);
}

function toggle_datumsfeld(toggler){
  if(toggler.value == 'on'){
    document.getElementById('enddatum').style.visibility = 'hidden';
  }else{
    document.getElementById('enddatum').style.visibility = 'visible';
  }
}
//-->