function start_init()
{
  var im_et_01 = new Image();
  var im_et_02 = new Image();
  var im_et_03 = new Image();
  var im_et_04 = new Image();
  var im_et_05 = new Image();
  im_et_01.src = "images/nav_start_et01_hi.gif";
  im_et_02.src = "images/nav_start_et02_hi.gif";
  im_et_03.src = "images/nav_start_et03_hi.gif";
  im_et_04.src = "images/nav_start_et04_hi.gif";
  im_et_05.src = "images/nav_start_et05_hi.gif";
}


function changeEreignis (id, action, balken_id)
{
  var balken_element_id = "startseite_ereignis_balken_0" + balken_id;
  
  if (id < 10)
  {
    var bg_image_hi = "url(images/nav_start_er0" + id + "_hi.gif)";
    var bg_image = "url(images/nav_start_er0" + id + ".gif)";
    var ereignis_element_id = "startseite_ereignis_0" + id;
  }
  else
  {
    var bg_image_hi = "url(images/nav_start_er" + id + "_hi.gif)";
    var bg_image = "url(images/nav_start_er" + id + ".gif)";
    var ereignis_element_id = "startseite_ereignis_" + id;
  }
  

  if (action == "on")
  {
    document.getElementById(balken_element_id).style.visibility = "visible";
    document.getElementById(ereignis_element_id).style.backgroundImage = bg_image_hi;
    changeTopNaviLayer2(id, 'on');
  }
  else 
  {
    document.getElementById(balken_element_id).style.visibility = "hidden";
    document.getElementById(ereignis_element_id).style.backgroundImage = bg_image;
    changeTopNaviLayer2(id, 'off');
  }
}



function changeEtappe (id, action)
{
  var etappe_element_id = "startseite_etappe_0" + id;
 
  if (action == "on")
  {
    document.getElementById(etappe_element_id).style.visibility = "visible";

    changeTopNaviLayer(id, 'on');

    if (id == 1)
    {
      document.getElementById('startseite_ereignis_01').style.visibility = "visible";
      document.getElementById('startseite_ereignis_02').style.visibility = "visible";
      document.getElementById('startseite_ereignis_03').style.visibility = "visible";
    }
    else if (id == 2)
    {
      document.getElementById('startseite_ereignis_04').style.visibility = "visible";
      document.getElementById('startseite_ereignis_05').style.visibility = "visible";
      document.getElementById('startseite_ereignis_06').style.visibility = "visible";
      document.getElementById('startseite_ereignis_07').style.visibility = "visible";
      document.getElementById('startseite_ereignis_08').style.visibility = "visible";
    }
    else if (id == 3)
    {
      document.getElementById('startseite_ereignis_09').style.visibility = "visible";
      document.getElementById('startseite_ereignis_10').style.visibility = "visible";
      document.getElementById('startseite_ereignis_11').style.visibility = "visible";
    }
    else if (id == 4)
    {
      document.getElementById('startseite_ereignis_12').style.visibility = "visible";
      document.getElementById('startseite_ereignis_13').style.visibility = "visible";
      document.getElementById('startseite_ereignis_14').style.visibility = "visible";
    }
    
  }
  else
  {
    document.getElementById(etappe_element_id).style.visibility = "hidden";

    changeTopNaviLayer(id, 'off');

    if (id == 1)
    {
      document.getElementById('startseite_ereignis_01').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_02').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_03').style.visibility = "hidden";
    }
    else if (id == 2)
    {
      document.getElementById('startseite_ereignis_04').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_05').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_06').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_07').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_08').style.visibility = "hidden";
    }
    else if (id == 3)
    {
      document.getElementById('startseite_ereignis_09').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_10').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_11').style.visibility = "hidden";
    }
    else if (id == 4)
    {
      document.getElementById('startseite_ereignis_12').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_13').style.visibility = "hidden";
      document.getElementById('startseite_ereignis_14').style.visibility = "hidden";
    }

  }
}