var transEndEvent = {
  'WebkitTransition': 'webkitTransitionEnd',
    'MozTransition'   : 'transitionend',
    'OTransition'     : 'oTransitionEnd otransitionend',
    'msTransition'    : 'MSTransitionEnd',
    'transition'      : 'transitionend'
}[ Modernizr.prefixed('transition') ];