function subAktiv01 (tableBack) {
  document.getElementById(tableBack).style.backgroundImage = "url(img/navi/nav-back02-blau.gif)";
}

function subPassiv01 (tableBack) {
  document.getElementById(tableBack).style.backgroundImage = "url(img/navi/nav-back01-blau.gif)";
}

function subAktiv02 (tableBack) {
  document.getElementById(tableBack).style.backgroundImage = "url(img/navi/nav-back01-blau.gif)";
}

function subPassiv02 (tableBack) {
  document.getElementById(tableBack).style.backgroundImage = "url(img/navi/nav-back02-blau.gif)";
}

// Farbumschaltung Hauptnavi fuer Technik und Bewirtschaftung
function activFarbe1() {
  document.getElementById('t01').style.backgroundImage = "url(img/navi/nav_technik1-blau-on.gif)";
}
function activFarbe2() {
  document.getElementById('t02').style.backgroundImage = "url(img/navi/nav_bewirtschaftung1-blau-on.gif)";
}

function passivFarbe1() {
  document.getElementById('t01').style.backgroundImage = "url(img/navi/nav_technik1-blau.gif)";
}
function passivFarbe2() {
  document.getElementById('t02').style.backgroundImage = "url(img/navi/nav_bewirtschaftung1-blau.gif)";
}