window.addEvent('domready', function() {
    var slideItems = $$("#micrositios div.logos ul li");
    var tracking = 0;
    var pageSize = 4;

	var scroll = new Fx.Scroll($$('.logos')[0],
	{
		wait: false,
		duration: 450,
		transition: Fx.Transitions.Cubic.easeInOut
	});
	$('previous').addEvent('click', function(e)
	{
//		e = new Event(e).stop();
//		if(tracking==2)return;
//		scroll.toElement(anchors[tracking+1]);
//		tracking++;
	    e = new Event(e).stop();
	    if (tracking == Math.floor(slideItems.length / pageSize)) {
	        scroll.toElement(slideItems[0]);
	        tracking = 0;
	    }
	    else {
	        scroll.toElement(slideItems[pageSize * (tracking + 1)]);
	        tracking++;
	    }
	});	
	$('next').addEvent('click', function(e)
	{
//		e = new Event(e).stop();
//		if(tracking==0)return;
//		scroll.toElement(anchors[tracking-1]);
//		tracking--;
	    e = new Event(e).stop();
	    if (tracking == 0) {
	        tracking = Math.floor(slideItems.length / pageSize);
	        scroll.toElement(slideItems[slideItems.length - 1]);
	    }
	    else {
	        scroll.toElement(slideItems[pageSize * (tracking - 1)]);
	        tracking--;
	    }
	});
});