function zeigen () {
  if (document.getElementById)
    document.getElementById("liste").style.display = "table-row";
    document.getElementById("plus").style.display = "none";
    document.getElementById("minus").style.display = "inline";
}
function verstecken () {
  if (document.getElementById)
    document.getElementById("liste").style.display = "none";
    document.getElementById("plus").style.display = "inline";
    document.getElementById("minus").style.display = "none";
}
function zeige () {
  if (document.getElementById)
    document.getElementById("list").style.display = "table-row";
    document.getElementById("plu").style.display = "none";
    document.getElementById("minu").style.display = "inline";
}
function verstecke () {
  if (document.getElementById)
    document.getElementById("list").style.display = "none";
    document.getElementById("plu").style.display = "inline";
    document.getElementById("minu").style.display = "none";
}
function zeig () {
  if (document.getElementById)
    document.getElementById("lis").style.display = "table-row";
    document.getElementById("pl").style.display = "none";
    document.getElementById("min").style.display = "inline";
}
function versteck () {
  if (document.getElementById)
    document.getElementById("lis").style.display = "none";
    document.getElementById("pl").style.display = "inline";
    document.getElementById("min").style.display = "none";
}