$(document).ready(function(){
    var current = '2';
    var next = '3';
    $('#promo').everyTime(7000, function(){
        current = next;
        if(current == 3) next = 1;
        if(current == 2) next = 3;
        if(current == 1) next = 2;
        $('.promo' + current).fadeOut(1000, function(){
            $('.promo' + next).fadeIn(1000);
        });
    });
});