解决方法

element.addEventListener('transitionend',function(event) {
    alert("CSS Property completed: " + event.propertyName);
},false );

现在,确切的事件名称尚未标准化.这是MDN的报价：

There is a single event that is fired when transitions complete.
In all standard-compliant browser,the event is transitionend,
in WebKit it is webkitTransitionEnd.

这是Webkit的小提琴：http://jsfiddle.net/bNgWY/