cross browser transition events

transition_events.js

var _getTransitionEvent = function(){
        if(this._transition) return this._transition;
        var transitions = {
                'transition':'transitionend',
                'OTransition':'oTransitionEnd',
                'MozTransition':'transitionend',
                'WebkitTransition':'webkitTransitionEnd'
            };

        return _transition = (function(){
            var t,
                el = document.createElement('dummy')
            for(t in transitions){
                if(el.style[t] !== undefined) return transitions[t];
            }
        })();
    };