Dynamicky závislý select příklad z planette

Pomůže někdo prosím s rozchozením dynamicky závislého selectu? Nějak se mně nedaří rozjet tento příklad:
https://blog.nette.org/…-and-pure-js

Presenter:

       public function handleSelectLoad($static_id)
{
    $form = $this->getComponent("selectForm"); // our form

    // for demo only! this part will use database to load your select using $value
    // $this->models->options->getItemsForGroup($static_id);
    $newArray = array(
        "I am new, I have changed!",
    );

    $form["dynamic"]->setItems($newArray); // set up new values
    $this->invalidateControl("form"); // invalidate ajax snippet
}


/**
 * Simple form
 **/
protected function createComponentSelectForm()
{
    $staticArray = array(
        "I am static",
        "I am static two/too",
    );

    $dynamicArray = array(
        "Change the 'static' and I will change",
        "Me too",
    );

    $form = new UI\Form;
    $form->addSelect("static","Choose me:", $staticArray);
    $form->addSelect("dynamic","I am dynamic:", $dynamicArray);

    $form->addSubmit("send", "Submit");
    $form->onSuccess[] = callback($this, "selectFormSent");

    return $form;
}


/**
 * Shows values from selects
 * @param form
 **/
public function selectFormSent(Form $form)
{
    $values = $form->getHttpData(); // getValues() is not enough for $form["dynamic"]
    unset($values["send"]); // we don't need this

    // save values...
}

Latte:

{form selectForm}
    {label static /} {input static}
    {snippet form}
        {label dynamic /} {input dynamic}
    {/snippet}
{/form}


<script type="text/javascript">
    $("form").delegate('#'+{$control["selectForm-static"]->htmlId}, 'change', function() {
        $.nette.ajax({
    url: {link Sign:default, do => 'selectLoad'},
    type: 'get'
});
    });


</script>

Nějak se při změně prvního selectu nic nestane…