<zk>
	<zscript>
	Object[] obj = new Object[50];
	</zscript>
	<button label="show1" onClick="c1.setVisible(true)" />
	<button label="show3" onClick="c3.setVisible(true)" />
	<div height="550px" width="700px">
		<tree id="myTreeA" vflex="1" hflex="1">
			<treecols sizable="true">
				<treecol label="c0" id="c0" hflex="2" />
				<treecol label="c1" id="c1" hflex="1" visible="false" />
				<treecol label="c2" id="c2" hflex="1" />
				<treecol label="c3" id="c3" hflex="1" visible="false" />
				<treecol label="c4" id="c4" hflex="1" />
			</treecols>
			<treechildren>
				<treeitem forEach="${obj}" open="false">
					<treerow>
						<treecell label="Row A ${forEachStatus.index}" />
						<treecell label="0.0" />
						<treecell label="0.0" />
						<treecell label="0.0" />
						<treecell label="0.0" />
					</treerow>
					<treechildren>
						<treeitem>
							<treerow>
								<treecell
									label="Row A ${forEachStatus.index} X" />
								<treecell label="0.0" />
								<treecell label="0.0" />
								<treecell label="0.0" />
								<treecell label="0.0" />
							</treerow>
						</treeitem>
						<treeitem>
							<treerow>
								<treecell
									label="Row A ${forEachStatus.index} X" />
								<treecell label="0.0" />
								<treecell label="0.0" />
								<treecell label="0.0" />
								<treecell label="0.0" />
							</treerow>
						</treeitem>
					</treechildren>
				</treeitem>
			</treechildren>
		</tree>
	</div>
</zk>