Mine

btn_r.onRelease = function() {
	startID++;
	mainID = startID;
	trace("mainID "+mainID);
	new Tween(mainslider, "_x", Regular.easeInOut, mainslider._x, mainslider._x-150, .5, true);
	if (startID == 20) {
		mainslider.slider_l._x = mainslider.slider_r._x+mainslider.slider_r._width;
		mainslider.slider_l._name = "temp";
		mainslider.slider._name = "slider_l";
		mainslider.slider_r._name = "slider";
		mainslider.temp._name = "slider_r";
		startID = -1;
	}
};
btn_l.onRelease = function() {
	startID++;
	mainID = 21-startID;
	trace("mainID "+mainID);
	new Tween(mainslider, "_x", Regular.easeInOut, mainslider._x, mainslider._x+150, .5, true);
	if (startID == anzahl) {
		mainslider.slider_r._x = mainslider.slider_l._x-mainslider.slider_l._width;
		mainslider.slider_r._name = "temp";
		mainslider.slider._name = "slider_r";
		mainslider.slider_l._name = "slider";
		mainslider.temp._name = "slider_l";
		startID = anzahl;
	}
};
//
function duplizieren() {
	for (var i = 0; i<anzahl; i++) {
		this.mainslider.slider.attachMovie("bild", "bild"+i, i);
		this.mainslider.slider["bild"+i].bild_id.text = i;
		this.mainslider.slider["bild"+i]._x = this.mainslider.slider["bild"+i]._width*i;
		//this.mainslider.slider_r._x = this.mainslider.slider._x+this.mainslider.slider_r._width;
		ladeExterneBilder(_root.mainslider.slider["bild"+i], i);
		//
		this.mainslider.slider_l.attachMovie("bild", "bild"+i, i);
		this.mainslider.slider_l["bild"+i].bild_id.text = i;
		this.mainslider.slider_l["bild"+i]._x = this.mainslider.slider_l["bild"+i]._width*i;
		this.mainslider.slider_l._x = this.mainslider.slider._x-this.mainslider.slider._width;
		ladeExterneBilder(_root.mainslider.slider_l["bild"+i], i);
		//
		this.mainslider.slider_r.attachMovie("bild", "bild"+i, i);
		this.mainslider.slider_r["bild"+i].bild_id.text = i;
		this.mainslider.slider_r["bild"+i]._x = this.mainslider.slider_r["bild"+i]._width*i;
		//this.mainslider.slider_r._x = this.mainslider.slider._x+this.mainslider.slider_r._width;
		ladeExterneBilder(_root.mainslider.slider_r["bild"+i], i);
	}
}