$j = jQuery.noConflict();
testimonials = $j("ul#testimonials li");
current = Math.floor(Math.random() * testimonials.length);

$j(testimonials[current]).show();

setInterval(changeTestimonial, 14000);

function changeTestimonial() {
    $j(testimonials[current]).fadeOut(2000);
    if (current == testimonials.length-1) {
        current = 0;
    } else {
        current++;
    }
    $j(testimonials[current]).fadeIn(2000);
}