<zk>
    <grid>
        <!--
            Increase the number of array or shrink the browser if necessary.
        -->
        <zscript>Object[] o = new Object[20];</zscript>
        <auxhead>
            <auxheader forEach="${o}">aaaaaaaaa</auxheader>
        </auxhead>
        <columns>
            <column forEach="${o}">aaaaaaaaa</column>
        </columns>
        <rows>
            <row>
                <cell forEach="${o}">aaaaaaaaa</cell>
            </row>
        </rows>
    </grid>
    <button label="click" onClick="block.setVisible(!block.isVisible())"/>
    <vlayout id="block" visible="false">
        <zscript>Object[] spaces = new Object[50];</zscript>
        <space forEach="${spaces}"/>
    </vlayout>
</zk>