btnHome_on=new Image();
btnHome_off=new Image();
btnLinks_on=new Image();
btnLinks_off=new Image();
btnGerman_on=new Image();
btnGerman_off=new Image();
btnEnglish_on=new Image();
btnEnglish_off=new Image();

function init_header_buttons(depth)
{
  if (depth==0)
  {
    btnHome_off.src="./styles/icons/home_40.png";
    btnHome_on.src="./styles/icons/home_40_active.png";

    btnLinks_off.src="./styles/icons/links_40.png";
    btnLinks_on.src="./styles/icons/links_40_active.png";

    btnEnglish_off.src="./styles/icons/english_40.png";
    btnEnglish_on.src="./styles/icons/english_40_active.png";

    btnGerman_off.src="./styles/icons/german_40.png";
    btnGerman_on.src="./styles/icons/german_40_active.png";
  }
  else if (depth==1)
  {
    btnHome_off.src="../styles/icons/home_40.png";
    btnHome_on.src="../styles/icons/home_40_active.png";

    btnLinks_off.src="../styles/icons/links_40.png";
    btnLinks_on.src="../styles/icons/links_40_active.png";

    btnEnglish_off.src="../styles/icons/english_40.png";
    btnEnglish_on.src="../styles/icons/english_40_active.png";

    btnGerman_off.src="../styles/icons/german_40.png";
    btnGerman_on.src="../styles/icons/german_40_active.png";
  } 
  else if (depth==2)
  {
    btnHome_off.src="../../styles/icons/home_40.png";
    btnHome_on.src="../../styles/icons/home_40_active.png";

    btnLinks_off.src="../../styles/icons/links_40.png";
    btnLinks_on.src="../../styles/icons/links_40_active.png";

    btnEnglish_off.src="../../styles/icons/english_40.png";
    btnEnglish_on.src="../../styles/icons/english_40_active.png";

    btnGerman_off.src="../../styles/icons/german_40.png";
    btnGerman_on.src="../../styles/icons/german_40_active.png";
  }

  return 3;
}

function BtnOn(imgID)
{
  if ( document.images )
  {
    document.getElementById(imgID).src = eval(imgID + "_on.src");
  }
}

function BtnOff(imgID)
{
  if ( document.images )
  {
    butOff = eval ( imgID + "_off.src" );
    document.getElementById(imgID).src = butOff;
  }
}


function ToggleLanguage()
{
  var sURL = document.URL;
  if (sURL.indexOf("_de")!=-1)
  {
    sURL = sURL.replace("_de", "_en");
  }
  else if (sURL.indexOf("_en")!=-1)
  {
    sURL = sURL.replace("_en", "_de");
  }
  else
  {
    sURL = "http://beltoforion.de/index_en.html";
  }
  document.location.href=sURL;
}