window.addEvent('domready',function() { 

	var imonialitems = new Array();
	imonialitems = $$('.testimonial_box');
	var interval;
	var itemDuration = 8000;
	var currentIndex = 0;

	imonialitems.each(function(item, i) {
		if(i > 0){
			item.set('opacity', 0);
		}
	});
	
	var show = function() {
		imonialitems[currentIndex].fade('out');
		imonialitems[currentIndex = currentIndex < imonialitems.length - 1 ? currentIndex+1 : 0].fade('in');
	}

	interval = show.periodical(itemDuration);
});