<context-param>

<description>

The location where state information is saved.

Valid values are 'server' (typically saved in HttpSession) and 'client' (typically

saved as a hidden field in the form.

Default is server.</description>

<param-name>javax.faces.STATE_SAVING_METHOD</param-name>

<param-value>client</param-value>

</context-param>

<context-param>

In the Backing Bean:

 public void onItemsRequested(ItemsRequestedEvent event)
 {
  
  HtmlDropDown dropDown = (HtmlDropDown)event.getComponent();
  String cv = (String) dropDown.getCurrentValue();
  
  System.out.println("Updating for "  + cv);
  
  ArrayList ees = employees.getEmployees(cv);
  List newItems = new ArrayList();
  HtmlDropDownItem item;
  for(int i=0;i<ees.size();i++) {
   item = new HtmlDropDownItem();
   item.setText((String)ees.get(i));
   newItems.add(item);
  }  
  DataModel filteredModel = new ListDataModel(newItems);
  dropDown.getItems().clear();
  dropDown.setDataSource(filteredModel);
 }