<zk>
	<label multiline="true">
	Click "Upload" button, should not see any JS error.
	</label>
	<vbox hflex="1">
		<button label="Upload" onClick="vbox1.setVisible(true);" />
		<vbox hflex="1" id="vbox1" visible="false"></vbox>
		<window title="window" visible="false" border="normal">
			Window
		</window>
	</vbox>
</zk>

<script type="text/javascript"><![CDATA[
zk.afterLoad('zul.box', function() {
	var _xBox = {};
	zk.override(zul.box.Box.prototype, _xBox, {
		afterResetChildSize_: function () {
			for (var kid = this.firstChild, vert = this.isVertical(); kid; kid = kid.nextSibling) {
				if (kid.desktop) { //kid may not bind to desktop yet (client rod enabled)
					var chdex = vert  ? kid.$n('chdex').firstChild : kid.$n('chdex');
					if (chdex)
						chdex.style.minWidth = '1px';
				}
			}
		}
	});
});
]]></script>