Test case:

<zk>
<div>
1. Click "Button Visible" and focus on the inplace Datebox and Spinner. The DOM layout should be correct.
</div>
<div>
2. Click "Button Visible" again. The DOM layout should be correct.
</div>
<div>
Datebox:
<datebox id="db" buttonVisible="false" inplace="true" />
</div>
<div>
Spinner:
<spinner id="sp" buttonVisible="false" inplace="true" value="0" />
</div>
<button label="Button Visible">
<attribute name="onClick">
sp.buttonVisible = !sp.buttonVisible;
db.buttonVisible = !db.buttonVisible;
lb.value = "" + sp.buttonVisible;
</attribute>
</button>
<label id="lb" />
</zk>