Wicket Handling JavaScript Events

Wicket provides useful classes for handling of JavaScript events such as:

1. onMouseOver
2. onMouseOut
3. onFocus
4. onBlur
5. onKeyUp
6. onKeyDown
7. etc.

Full list of events here www.w3schools.com/jsref/dom_obj_event.asp
To handle a JavaScript event e.g. onMouseOver on an element on the page hierarchy, add the following:

add(new AjaxEventBehavior("onMouseOver") {
    protected void onEvent(AjaxRequestTarget target) {
        // do something.....
    }
}
);

AjaxFormSubmitBehavior can be used in a similar way to achieve the same results when it is necessary to capture information for processing (e.g. real time search)

Also note that for very chatty Ajax events like onKeyUp & onKeyDown, setThrottleDelay can be used.