How to invoke an action in jsf using ajax

[Nila dhan]

How to invoke a jsf action using ajax.
I have a MultiselectList box

  
<h:selectManyListbox id="product" onclick="lookup();" style="width: 130px; height: 75px;font-size: xx-small;" value="#{CCW.productsArray}"   >
     <f:selectItems value="#{CCW.products}"/> 
</h:selectManyListbox>

Onclick of the List box, I have invoke an action in the CCW bean. The action is CCW>fetchResults()
Please advice

[Tim Holloway]

I believe what you really want is "onchange", not "onclick". If you do brute-force AJAX, your AJAX method will have to manually extract the new value from the listbox and send it to the server, and the server will need an appropriate URL handler - you can't just expect a JSF action method to be fired.

RichFaces, IceFaces, and several other extension tagsets have built-in AJAX support that can make this job much easier, including providing the ability for fire a backing bean action method or event.

[Nila dhan]

Thank you Tim