function Fader(einstellungen) {
	if (!einstellungen.id || !document.getElementById(einstellungen.id)
		|| einstellungen.images.length < 2) {

		return new Boolean(false);
	}

	var i, original = document.getElementById(einstellungen.id);

	this.id = einstellungen.id;
	this.images = new Array();
	this.counter = 0;

	this.element = document.createElement("span");
	this.element.className = "fader";
	original.parentNode.replaceChild(this.element, original);
	
	for (i = 0; i < einstellungen.images.length; i++) {
		this.images[i] = document.createElement("img");
		this.images[i].src = einstellungen.images[i];
		this.images[i].alt = "Bild";

		if (i == 0) {
			this.element.appendChild(this.images[i]);
		}
	}

	this.fade = function (step) {
		var fader = this, imgs = this.element.getElementsByTagName("img");

		step = step || 0;

		imgs[1].style.opacity = step/100;
		imgs[1].style.filter = "alpha(opacity=" + step + ")"; // IE?

		step = step + 2;

		if (step <= 100) {
			window.setTimeout(function () { fader.fade(step); }, einstellungen.animationsDauer/50);
		} else {
			imgs[1].className = "";
			this.element.removeChild(imgs[0]);
			window.setTimeout(function () { fader.next(); }, einstellungen.anzeigeDauer);
		}
	};

	this.next = function () {
		this.counter = (this.counter < this.images.length -1) ? this.counter +1 : 0;

		this.element.appendChild(this.images[this.counter]);
		this.images[this.counter].className = "next";
		this.fade();
	};
}