<hlayout>
	<zscript><![CDATA[
		String[] data = new String[300];
		for (int j = 0; j < data.length; ++j) {
			data[j] = "option " + j;
		}
		ListModel strset = new SimpleListModel(data);
	]]></zscript>
	<listbox width="200px" height="250px" model="${strset}">
		<custom-attributes org.zkoss.zul.listbox.rod="false"/>
		<listhead>
			<listheader label="Load on demend" />
		</listhead>
		<template name="model">
			<listitem renderdefer="1000">
				<listcell>${each}</listcell>
			</listitem>
		</template>
	</listbox>
</hlayout>