<af:document id="d1" binding="#{backingBeanScope.Page.d1}"
               title="Ввод события поставки" clientComponent="true"
               unsecure="window.close;">

<af:document id="d1" binding="#{backingBeanScope.Page.d1}"
               title="Ввод события поставки" clientComponent="true"
onunload="alert('!!!!');">

  <af:document id="d1" binding="#{backingBeanScope.Page.d1}" clientComponent="true"
               onunload="performUnloadEvent">
<af:resource type="javascript">
  window.addEventListener('beforeunload',
                           function (){performUnloadEvent()},false)     
function performUnloadEvent(){
  //note that af:document must have clientComponent="true" set
  //for JavaScript to access the component object
  var eventSource = AdfPage.PAGE.findComponentByAbsoluteId('d1');
  //var x and y are dummy variables obviously needed to keep the page
  //alive for as long it takes to send the custom event to the server
  var x = AdfCustomEvent.queue(eventSource,
                               "handleOnUnload",
                               {args:'noargs'},false);
  //replace args:'noargs' with key:value pairs if your event needs to
  //pass arguments and values to the server side managed bean.

  var y = 0;

}
</af:resource>

<af:serverListener type="handleOnUnload"
                   method="#{backingBeanScope.Page.onUnloadHandler}"/>    

  public void onUnloadHandler(ClientEvent clientEvent) 
  {
    System.out.println("!!!!!!!!!!!!!!!");
  }