function eventFire(el, etype){
  if (el.fireEvent) {
    (el.fireEvent('on' + etype));
  } else {
    var evObj = document.createEvent('Events');
    evObj.initEvent(etype, true, false);
    el.dispatchEvent(evObj);
  }
}

var checkFun = function() {
   var cookie = document.getElementById('goldenCookie');
   if(cookie.style.opacity > 0) {
       console.log(cookie.style.opacity);
       console.log('Clicked');
       eventFire(cookie, 'click');
   }
}

setInterval(checkFun, 1000);