问如何确定jquery选项卡是因为用户单击还是因为选项卡旋转而显示

EN

var isRotating = false,
    rotationInterval = 5 * 1000, // 5 seconds
    rotationTimerId;

function rotate() {

    var tabsElement = $('#my-tabs'),
        currentIndex = tabsElement.tabs('options', 'selected'),
        maxIndex = tabsElement.tabs('length') - 1,
        nextIndex = currentIndex === maxIndex ? 0 : (currentIndex + 1);

    isRotating = true;
    tabsElement.tabs('select', nextIndex);
    isRotating = false;

}
function startRotation() {

    if (!rotationTimerId) {
        rotationTimerId = window.setInterval(rotate, rotationInterval);
    }

}
function stopRotation() {

    if (rotationTimerId) {
        window.clearInterval(rotationTimerId);
        rotationTimerId = null;
    }

}

$('#my-tabs').tabs({
    select: function() {
        alert(isRotating ? 'this is from the rotation' : 'this is from a user click');
    }
});
startRotation();