ure phase and another that listens during the target and
bubbling phases.</p>
<p>You cannot register an event listener for only the target phase or the
bubbling phase. Those phases are coupled during registration because
bubbling applies only to the ancestors of the target node.</p>
<p>If you no longer need an event listener, remove it by calling
<code>removeEventListener()</code>, or memory problems could result. Event
listeners are not automatically removed from memory because the garbage
collector does n