// Uncomment the following option if you want items
// which are outside the visible range to be removed
// from the DOM.
// Useful for carousels with MANY items.
auto: 1,
// wrap: 'last',
wrap: 'circular',
// easing: 'BounceEaseOut',
// vertical: true,
animation: 2500,
visible: 3,
speed:1000 ,
wrap: 'circular',

// itemVisibleOutCallback: {onAfterAnimation: function(carousel, item, i, state, evt) { carousel.remove(i); }},
itemLoadCallback: mycarousel_itemLoadCallback

这解决了我的问题。