Fader = new Class({
    initialize: function(selector, interval, duration) {
		this.elements = $$(selector);
		if (this.elements.length < 2) {
			return;
		}
		this.interval = interval * 1000;
		this.duration = duration * 1000;
        this.effects = [];
		this.index = 0;
		this.elements.each(function(element, i) {
			element.get('tween').setOptions({duration: this.duration});
			if (i != 0) {
				element.setStyle('opacity', 0);
			}
		}, this);
		this.timer = this.rotate.periodical(this.interval, this);
    },
	rotate: function() {
		var index = (this.index == this.elements.length - 1) ? 0 : this.index + 1;
		
		this.elements[index].setStyle('z-index', 1);
		this.elements[this.index].setStyle('z-index', 0);
			
		this.elements[index].fade(1);
		var delay = function(element) {
			element.fade(0);
		}
		delay.delay(this.duration, this, this.elements[this.index]);
		
		this.index = index;	
	}
});