function hidelayer(){
  document.body.style.marginTop="-50px";
  document.getElementById("kopftabelle").style.visibility = "hidden";
  counterframe.location.reload();
  document.getElementById("einblender").style.visibility = "visible";
  document.getElementById("einblender").style.height = "1.5em";
}

function showlayer(){
  document.body.style.marginTop="0px";
  document.getElementById("kopftabelle").style.visibility = "visible";
  counterframe.location.reload();
  document.getElementById("einblender").style.visibility = "hidden";
  document.getElementById("einblender").style.height = "0px";
}