ener was registered for both the capture phase and
the target and bubbling phases, two calls to
<code>removeEventListener()</code> are required to
remove both, one call with <code>useCapture()</code> set
to <code><a href="../../Bool.html">true</a></code>, and another call with
<code>useCapture()</code> set to <code><a href="../../Bool.html">false</a></code>.</p></td></tr></table></div></div><div class="field "><a name="toString"></a><h3 class="anchor"><code><a href="#toString"><span class="identifier">toStr