New Layout Panels and Centering

I am trying to "center" a panel of text in the North DockLayoutPanel.
I get the following to work on firefox but not IE6. On IE, it looks
like the widths are being ignored (or resized) and the position:
absolute causes problems.

Any suggestions on how I can "center" a panel?

public class Application implements EntryPoint{

public void onModuleLoad(){
DockLayoutPanel dock = new DockLayoutPanel(Unit.PX);

Widget w = new HTML("Text To Center Goes Here!<br/><hr/>");

LayoutPanel inner = new LayoutPanel();
inner.add(w);
inner.setWidth("960px");
inner.addStyleName("centerstyle");

dock.addNorth(inner, 50);

RootLayoutPanel.get().add(dock);
}

}

The style is:
.centerstyle{
margin: 0 auto;
}

and in firefox this will center the "inner" panel.

TIA,
Chris....

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.