var activebox = 1;
var nextbox = 2;
var imageId = activebox;

function slide(laenge) {
document.getElementById('content' + activebox).style.display='none';
document.getElementById('content' + nextbox).style.display='block';
activebox = nextbox;
nextbox++;
if (nextbox > laenge) nextbox = 1;
imageId++;
if (imageId > laenge) imageId = 1;
}

transparency01 = 1;



function initfadeIn_01() {
  image = document.getElementById(imageId);
  setOpacity(image, transparency01);
  image.style.visibility = 'visible';
  fadeIn01(imageId,1);
}

function reset01(activeTextId) {
  image = document.getElementById(imageId);
  setOpacity(image, transparency01);
  fadeOut01(imageId,transparency01);
  image.style.visibility = 'hidden';
}


function setOpacity(obj, opacity) {
  opacity = (opacity == 100)?99:opacity;
  
  // IE/Win
  obj.style.filter = "alpha(opacity:"+opacity+")";
  
  // Safari<1.2, Konqueror
  obj.style.KHTMLOpacity = opacity/100;
  
  // Older Mozilla and Firefox
  obj.style.MozOpacity = opacity/100;
  
  // Safari 1.2, newer Firefox and Mozilla, CSS3
  obj.style.opacity = opacity/100;
}

function fadeIn01(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      transparency01 = (opacity += 5)-5;
      aktiv01=window.setTimeout("fadeIn01('"+objId+"',"+opacity+")", 5);
    }
  }
}

function fadeOut01(objId,opacity) {
window.clearTimeout(aktiv01);

  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity >= 0) {
      setOpacity(obj, opacity);
      opacity -= 5;
      window.setTimeout("fadeOut01('"+objId+"',"+opacity+")", 10);
      }
  }
}