idTabs 2.2 How do I select no tab to be shown at start?

idTabs 2.2 How do I select no tab to be shown at start?

Here's the page I'm working on:
http://theemptyroom.org/thesis/hotc_map.html

I'm using idTabs for the legend on the left. The first tab links to a div called clear which has nothing in it. It's sorta a hack to get it to work correctly in Firefox, but IE and Chrome are still showing the Center For Wooden Boats tab content in the center of the page on load. Has anyone else had this problem?

I know that the idTabs homepage mentions that there is the ability to make no tab's content show as default. Would someone be able to help show me how to activate that setting? I think that would fix my problem.

Thanks in advance.