Use of captureEvents() is deprecated. To upgrade your code, use the DOM 2 addEventListener() method. For more help http://developer.mozilla.org/en/docs/DOM:element.addEventListener
L'usu de captureEvents() ta desaprobáu. P'anovar el códigu, usa'l métodu addEventListener() de DOM2. Pa más info, visita http://developer.mozilla.org/en/docs/DOM:element.addEventListener