<zscript>

        List model = Arrays.asList(java.util.Locale.getAvailableLocales());

    </zscript>

    <listbox id="lb" multiple="true" model="${model}" mold="paging" pageSize="5"/>

    <button label="set selection" onClick='lb.setSelectedItem(java.util.Locale.ENGLISH)'/>

</zk>

​