function toggle_visibility1(id1,id2,id3) {
  var on = document.getElementById(id1);
  var Mon = document.getElementById('M_'+id1);
  var off1 = document.getElementById(id2);
  var Moff1 = document.getElementById('M_'+id2);
  var off2 = document.getElementById(id3);
  var Moff2 = document.getElementById('M_'+id3);
  
  if(on.style.visibility == 'visible'){
    on.style.visibility = 'hidden';
    Mon.className = 'inactivelink';
    off1.style.visibility = 'hidden';
    Moff1.className = 'inactivelink';
    off2.style.visibility = 'hidden';
    Moff2.className = 'inactivelink';
    /*toggle_visibility2(0,0,true);*/
  }
  else{
    on.style.visibility = 'visible';
    Mon.className = 'activelink';
    off1.style.visibility = 'hidden';
    Moff1.className = 'inactivelink';
    off2.style.visibility = 'hidden';
    Moff2.className = 'inactivelink';
    /*toggle_visibility2(0,0,true);*/
  }
}

function toggle_visibility2(id1,id2,all) {
  var on = document.getElementById(id1);
  var off = document.getElementById(id2);

  if(all == true){
    var all1 = document.getElementById('topvisualsubnavi1');
    var all2 = document.getElementById('topvisualsubnavi2');
    all1.style.visibility = 'hidden';
    all2.style.visibility = 'hidden';
  }
  else{
    if(on.style.visibility == 'visible'){
      on.style.visibility = 'hidden';
      off.style.visibility = 'hidden';
    }
    else{
      on.style.visibility = 'visible';
      off.style.visibility = 'hidden';
      /*fillin(id1,id2);*/
    }
  }
}

function fillin(id1,id2) {
  alert(id1 + " & "  + id2);
  var subnavi1 = document.getElementById(id1);
  var subnavi2 = document.getElementById(id2);

  var subnav11 = document.createTextNode("Hallo1");
  var subnav12 = document.createTextNode("Hallo2");
  var subnav13 = document.createTextNode("Hallo3");
  subnavi1.appendChild(subnav11);
  subnavi1.appendChild(subnav12);
  subnavi1.appendChild(subnav13);
}

function message(id1) {
  alert(id1);
}