function referenceSwitch() {
    
    var elements = '#references li';
    
    var active = $(elements+'.active');

    if ( active.length == 0 ) active = $(elements+':last');

    var next =  active.next().length ? active.next() : $(elements+':first');

    active.addClass('last-active');

    next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            active.removeClass('active last-active');
        });
}

// copies messages to the top
$(function() {
    $('.message-ok, .message-error, message-info').prependTo($('#content-bar'));
});