/* ------- original --------------------*/ 
function toggleMe(a){
  var e=document.getElementById(a);
  if(!e)return true;
  if(e.style.display=="none"){
    e.style.display="block"
  } else {
    e.style.display="none"
  }
  return true;
}

/* ------- erweitert --------------------

/* ------- erweitert -------------------- 
function aufklappen(element)
{
var status = document.getElementById(element).style.display;
document.getElementById('menue1').style.display = 'none';
document.getElementById('menue2').style.display = 'none';
document.getElementById('menue3').style.display = 'none';
if(status == "none"){document.getElementById(element).style.display = "block";}
}*/