else if (browser instanceof BrowserWebKit)
event = new WebKitKeyEventImpl(evtListener,request);
else if (browser instanceof BrowserOpera)
event = new OperaKeyEventImpl(evtListener,request);
else if (browser instanceof BrowserBlackBerryOld)
event = new BlackBerryOldKeyEventImpl(evtListener,request);
else // Desconocido
event = new GeckoKeyEventImpl(evtListener,request);
break;
}