Use of releaseEvents() is deprecated. To upgrade your code, use the DOM 2 removeEventListener() method. For more help http://developer.mozilla.org/en/docs/DOM:element.removeEventListener
Le uso de releaseEvents() es obsolete. Pro actualisar tu codice, usa le methodo DOM 2 removeEventListener(). Pro major auxilio http://developer.mozilla.org/en/docs/DOM:element.removeEventListener