<zk>
	<zscript>
	import org.zkoss.zksandbox.*;
	Comparator asc = new RowLabelComparator(true),
		dsc = new RowLabelComparator(false);
	</zscript>
	<grid>
		<columns sizable="true">
			<column label="hide me" hflex="min"/>
			<column label="hide 1st col" hflex="min" style="color:red"><checkbox  onClick="self.getParent().getPreviousSibling().setVisible(!self.getParent().getPreviousSibling().isVisible())" /></column>
			<column label="Brand" sortAscending="&#36;{asc}" sortDescending="&#36;{dsc}" hflex="2"/>
			<column label="Processor Type" hflex="1"/>
			<column label="Memory (RAM)" hflex="1"/>
			<column label="Price"  hflex="1"/>
			<column label="Hard Drive Capacity" hflex="1"/>
		</columns>
		<rows>
			<group label="Dell"/>
			<row>
				<label value="hidden" />
				<label value="visible" />
				<label style="padding-left:15px" value="Dell E4500 2.2GHz"/>
				<label value="Intel Core 2 Duo"/>
				<label value="2GB RAM"/>
				<label value="$261.00" style="color:green"/>
				<label value="500GB"/>
			</row>
			<row>
				<label value="hidden" />
				<label value="visible" />
				<label style="padding-left:15px" value="XP-Pro Slim Dell-Inspiron-530-s"/>
				<label value="Intel Core 2 Duo"/>
				<label value="2GB RAM"/>
				<label value="$498.93" style="color:green"/>
				<label value="500GB"/>				
			</row>
			<row>
				<label value="hidden" />
				<label value="visible" />
				<label style="padding-left:15px" value="Dell P4 3.2 GHz"/>
				<label value="Intel Pentium 4"/>
				<label value="4GB RAM"/>
				<label value="$377.99" style="color:green"/>
				<label value="500GB"/>				
			</row>
			<group label="Compaq"/>
			<row>
				<label value="hidden" />
				<label value="visible" />
				<label style="padding-left:15px" value="Compaq SR5113WM"/>
				<label value="Intel Core Duo"/>
				<label value="1GB RAM"/>
				<label value="$279.00" style="color:green"/>
				<label value="160GB"/>				
			</row>
			<row>
				<label value="hidden" />
				<label value="visible" />
				<label style="padding-left:15px" value="Compaq HP XW4200"/>
				<label value="Intel Pentium 4"/>
				<label value="4GB RAM"/>
				<label value="$980" style="color:green"/>
				<label value="500GB"/>				
			</row>
		</rows>
	</grid>
</zk>