function getOffsetX(objectIn) {
  if (!objectIn) {return(0)}
  currLeft = 0;
  do { currLeft += objectIn.offsetLeft; } while (objectIn = objectIn.offsetParent);
  return(currLeft);
}

function getOffsetY(objectIn) {
  if (!objectIn) { return(0)}
  currTop = 0;
  do { currTop += objectIn.offsetTop; } while (objectIn = objectIn.offsetParent);
  return(currTop);
}

function showSub(subname, objectIn) {
  document.getElementById(subname).style.left = getOffsetX(objectIn) + 1;
  document.getElementById(subname).style.top = getOffsetY(objectIn) + 31;
  document.getElementById(subname).style.display = 'block';
}

function hideAllSubs() {
  document.getElementById("dienstenMenu").style.display = 'none';
}