How to apply HTML element attribute to ZK element?

<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<zk xmlns:w="client">
<style>
	.z-listcell-cnt {
		-moz-user-select: none;
        -webkit-user-select: none;
	}
</style>
	<listbox>
		<attribute w:name="onBind">
			var chd = jq(this.$n()).find('.z-listcell-cnt').each(function (index, node) {
				jq(node).attr('unselectable', 'on'); //for IE
			});
		</attribute>
		<listhead>
			<listheader label="header" sort="auto" />
		</listhead>
		<listitem>
			<listcell label="Cell 1"/>
		</listitem>
		<listitem>
			<listcell label="Cell 2" />
		</listitem>
	</listbox>
</zk>