function subOff() {

  document.getElementById('organisation').style.color = '#333333';
  document.getElementById('projekte').style.color = '#333333';
  document.getElementById('gesellschaften').style.color = '#333333';
  document.getElementById('kontakte').style.color = '#333333';
  document.getElementById('presse').style.color = '#333333';
  document.getElementById('jobs').style.color = '#333333';
  
  document.getElementById('div_navi01').style.visibility = 'hidden';
  document.getElementById('div_navi02').style.visibility = 'hidden';
  
  document.getElementById('div_navi11').style.visibility = 'hidden';
  document.getElementById('div_navi12').style.visibility = 'hidden';
  document.getElementById('div_navi13').style.visibility = 'hidden';
  document.getElementById('div_navi14').style.visibility = 'hidden';
  document.getElementById('div_navi15').style.visibility = 'hidden';
  document.getElementById('div_navi16').style.visibility = 'hidden';
  
  document.getElementById('div_navi0back').style.visibility = 'hidden';
}

var test;

// Farbwechsel Rollover Hauptnavigation
function color1 (aktiv) {
 if (aktiv) {document.getElementById(aktiv).style.color = '#E20015';}
}
function color2 (aktiv) {
  if (aktiv != test) {document.getElementById(aktiv).style.color = '#333333';}
}

function subOn(ebene, aktiveEbene) {
  test = aktiveEbene;
// document.getElementById('t01').style.backgroundImage = "url(img/navi/nav-back1A-grau.gif)";

  subOff();
  document.getElementById(ebene).style.visibility = 'visible';
    if (aktiveEbene) {document.getElementById(aktiveEbene).style.color = '#E20015';}
  document.getElementById('div_navi0back').style.visibility = 'visible';
}


function subAktiv1 (tableBack) {
  document.getElementById(tableBack).style.backgroundImage = "url(img/navi/nav-back1A-grau.gif)";
}

function subPassiv1 (tableBack) {
  document.getElementById(tableBack).style.backgroundImage = "url(img/navi/nav-back1-grau.gif)";
}