this tag that can be a <code>ValueExpression</code> must be evaluated at tag
 execution time since the event name is used in the process of <code>Behavior</code>
 creation.</div>  If this tag is nested within a single
 <a href="../../../../../../../javax/faces/component/behavior/ClientBehaviorHolder.html" title="interface in javax.faces.component.behavior"><code>ClientBehaviorHolder</code></a> component:
 <ul>
 <li>If the <code>events</code> attribute value is not specified, 
 obtain the default event name 