Not tested in older browsers

getTransitionendEvent.js

function getTransitionendEventName() {
    if ('ontransitionend' in window) {
        // Firefox 16+, IE 10+, Chrome 26+, Opera 12.1+, Safari 6.1+
        return 'transitionend';
    } else if ('onwebkittransitionend' in window) {
        // Chrome 4+, Safari 3.1+
        return 'webkitTransitionEnd';
    } else if ('onmoztransitionend' in window) {
        // Firefox 4+
        return 'mozTransitionEnd';
    } else if ('onotransitionend' in document.body || (navigator.appName === 'Opera')) {
        // Opera 10.5+
        return 'oTransitionEnd';
    } else {
        // Not implemented
        return null;
    }
}