function show_ellebogen() {
  if (document.getElementById)
    document.getElementById("ellebogen").style.visibility = "visible";
}

function show_fussgelenk() {
  if (document.getElementById)
    document.getElementById("fussgelenk").style.visibility = "visible";
}

function show_hand() {
  if (document.getElementById)
    document.getElementById("hand").style.visibility = "visible";
}

function show_huefte() {
  if (document.getElementById)
    document.getElementById("huefte").style.visibility = "visible";
}

function show_knie() {
  if (document.getElementById)
    document.getElementById("knie").style.visibility = "visible";
}

function show_schulter() {
  if (document.getElementById)
    document.getElementById("schulter").style.visibility = "visible";
}

function show_zehen() {
  if (document.getElementById)
    document.getElementById("zehen").style.visibility = "visible";
}




function unshow_ellebogen() {
  if (document.getElementById)
    document.getElementById("ellebogen").style.visibility = "hidden";
}

function unshow_fussgelenk() {
  if (document.getElementById)
    document.getElementById("fussgelenk").style.visibility = "hidden";
}

function unshow_hand() {
  if (document.getElementById)
    document.getElementById("hand").style.visibility = "hidden";
}

function unshow_huefte() {
  if (document.getElementById)
    document.getElementById("huefte").style.visibility = "hidden";
}

function unshow_knie() {
  if (document.getElementById)
    document.getElementById("knie").style.visibility = "hidden";
}

function unshow_schulter() {
  if (document.getElementById)
    document.getElementById("schulter").style.visibility = "hidden";
}

function unshow_zehen() {
  if (document.getElementById)
    document.getElementById("zehen").style.visibility = "hidden";
}