Squence issue when attaching radio and radiogroup

<zk>
<div id="div"/>
<button label="click" >
	<attribute name="onClick"><![CDATA[
		Radiogroup g = new Radiogroup();
		Radio r = new Radio();
		r.setRadiogroup(g);
		div.appendChild(r);
		r = new Radio();
		r.setRadiogroup(g);
		div.appendChild(r);
		div.appendChild(g);
	]]></attribute>
</button>
</zk>