function fade(step) {
var imgs = document.getElementById("meinFader").getElementsByTagName("img");

step = step || 0;

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

step = step + 2;

if (step <= 100) {
window.setTimeout(function () { fade(step); }, 1);
} else {
window.setTimeout(next, 4000);
}
}

function next() {
var imgs = document.getElementById("meinFader").getElementsByTagName("img");

if (typeof(counter) != "number") {
counter = 0;
}

counter++;

if (counter < imgs.length) {
fade();
} else { 
counter = 0; 
for (i=0; i<imgs.length; i++){ 
imgs[i].style.opacity =0; 
imgs[i].style.filter = "alpha(opacity=0)"; // IE? 
}; 
fade();
}
next();
};