var FaderFramework = {

	oldWinOnLoad: false,
	inits: new Array(),
	faders: new Object(),

	init: function (einstellungen) {
		var fader;

		if (this.inits) {
			this.inits[this.inits.length] = einstellungen;
		} else {
			fader = new this.Fader(einstellungen);
			if (fader != false && !this.faders[fader.id]) {
				this.faders[fader.id] = fader;
				window.setTimeout(function () { fader.next(); }, fader.viewTime);
			}
		}
	},

	start: function () {
		this.oldWinOnLoad = window.onload;
		window.onload = function () {
			if (typeof(FaderFramework.oldWinOnLoad) == "function") {
				FaderFramework.oldWinOnLoad();
			}
			FaderFramework.onload();
		};
	},

	onload: function () {
		var i, fader, e, scripts = document.getElementsByTagName("script");
		for (i = 0; i < scripts.length; i++) {
			if (scripts[i].src && scripts[i].src.match(/scootergarageFaderFramework\.js/)) {
				this.baseURL = scripts[i].src.replace(/(^|\/)scootergarageFaderFramework\.js$/, "");
			}
		}
		if (this.baseURL) {
			e = document.createElement("link");
			e.type = "text/css";
			e.rel = "stylesheet";
			e.href = this.baseURL + "/scootergarageFader.css";
			document.getElementsByTagName("head")[0].appendChild(e);
		}
		fader = this.inits;
		delete this.inits;
		for (i = 0; i < fader.length; i++) {
			this.init(fader[i]);
		}
	},

	Fader: function (einstellungen) {
		if (!einstellungen.id || !document.getElementById(einstellungen.id)
			|| FaderFramework.faders[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 = false;
		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 : step;
			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); }, 1);
			} else {
				imgs[1].className = "";
				this.element.removeChild(imgs[0]);
				window.setTimeout(function () { fader.next(); }, 2000);
			}
		};
		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();
		};
	}
};

FaderFramework.start();