title: ZK How to handle multiple events?
body: <p>I have textbox and method which listens two events. </p>
  
  <pre><code>&lt;textbox id="test" /&gt;
  
  @Listen("onOK = #test; onBlur = #test")
  public void action(Event event) {
    // do something ...
  }
  </code></pre>
  
  <p>When I press Enter on the Textbox, the event  "onOK " is triggered. It's OK. 
  But then when I lose focus from the Texbox the  event  "onBlur" is triggered too.  It's bad, because in that case my method "action" is called two times.
  How can I cancel this second event ?</p>