// Scroller class:
var scroller = new Class({
	setOptions: function(options) {
		default_options = {
			speed: 1500,
			delay: 5000,
			direction: 'vertical',
			onComplete: Class.empty,
			onStart: Class.empty
		};
		$extend(default_options, options);
		this.options = default_options;
	},
	initialize: function(el, options) {
		this.timer = null;
		this.setOptions(options);
		this.el = $(el);
		this.items = this.el.getElements('li');
		var w = 0;
		var h = 0;
		if (this.options.direction.toLowerCase() == 'horizontal') {
			h = this.el.getSize().y;
			this.items.each(function(li, index) {
				w += li.getSize().x;
			});
		} else {
			w = this.el.getSize().x;
			this.items.each(function(li, index) {
				h += li.getSize().y;
			});
		}
		this.el.setStyles({
			position: 'absolute',
			top: 0,
			left: 0,
			width: w,
			height: h
		});
		this.fx = new Fx.Morph(this.el, {duration: this.options.speed, onComplete: function() {
			var i = (this.current == 0) ? this.items.length : this.current;
			this.items[i - 1].injectInside(this.el);
			this.el.setStyles({
				left: 0,
				top: 0
			});
		}.bind(this)});
		this.current = 0;
		this.next();
	},
	next: function() {
		this.current++;
		if (this.current >= this.items.length) this.current = 0;
		var pos = this.items[this.current];
		this.fx.start({
			top: -pos.offsetTop,
			left: -pos.offsetLeft
		});
		this.timer = this.next.bind(this).delay(this.options.delay + this.options.speed);
	},
	pause: function() {
		$clear(this.timer);
		this.timer = null;
	},
	resume: function() {
		if (this.timer == null) {
			this.next();
		}
	}
});