Calling _javascript_ function on wicket component's onclick has been created by Will Hoover (Jan 11, 2008).

Content:

Calling a _javascript_ function on a component's onclick:

...

new AjaxLink("link") {
  protected onClick(AjaxRequestTarget target) { ...}
  protected IAjaxCallDecorator getAjaxCallDecorator() {
    return new AjaxCallDecorator() {
      public CharSequence decorateScript(CharSequence script) {
        return "alert('This is my _javascript_ call'); " + script;
      }
    }
  }
}

...

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