// Funktionen zu Ueberblenden der Kopfbilder
//-----------------------------------------------------------------------------
function fade(step) {
  var divs = document.getElementById("headerFader").getElementsByTagName("div");

  step = step || 0;

  divs[newImgNo].style.opacity = step/100;
  divs[newImgNo].style.filter = "alpha(opacity=" + step + ")"; // 

  divs[oldImgNo].style.opacity = 1 - (step/100);
  divs[oldImgNo].style.filter = "alpha(opacity=" + (100 - step) + ")"; // 

  step = step + 2;

  if (step <= 100) {
      window.setTimeout(function() { fade(step); }, 50);
  } else {
      oldImgNo = newImgNo;
      window.setTimeout(fadeNext, 5000);
  }
}

//-----------------------------------------------------------------------------
function fadeStart() {
  var divs = document.getElementById("headerFader").getElementsByTagName("div");
  var s = location.pathname.substr(location.pathname.lastIndexOf('/') + 1, location.pathname.length);
  var startat = Math.floor(Math.random()*(divs.length+1)); 
  switch (s) {
    case "ferienwohnung": startat = 5; break;
    case "ackerbau": startat = 6; break;
    case "getreideprodukte" : startat = 10; break;
	case "original-braunvieh-zucht" : startat = 0; break;
	case "direktvermarktung" : startat = 9; break;
  }
  if (startat > 0) {	  
    divs[0].style.opacity = 0;
    divs[0].style.filter = "alpha(opacity=0)"; 
    divs[startat].style.opacity = 1;
    divs[startat].style.filter = "alpha(opacity= 100)"; 
  }
  newImgNo = startat;
  oldImgNo = startat;
  window.setTimeout(fadeNext, 5000);
}

//-----------------------------------------------------------------------------
function fadeNext() {  
  var divs = document.getElementById("headerFader").getElementsByTagName("div");
  newImgNo++;
  if (newImgNo >= divs.length) {
    newImgNo = 0;
  }
  fade();
}