Adding Javascript confirm dialog to AjaxButton

form.add(new AjaxButton("removeButton") {
 
    @Override 
    protected IAjaxCallDecorator getAjaxCallDecorator() {
        return new AjaxPreprocessingCallDecorator(super.getAjaxCallDecorator()) {
        private static final long serialVersionUID = 1L;
 
            @Override
            public CharSequence preDecorateScript(CharSequence script) {
                return "if(!confirm('Are you sure you want to delete this?')) return false;" + script;
            }
        };
    }
}