[jQuery] Nested Tabs

Hi I'm new to jQuery (a couple of weeks). I'm trying to nest the jQueryUI tab control. It works fine until the nested tabs are in an external file then I get an exception thrown in the jQuery source. This seems to be a timing issue to a certain extent, because if I place alert boxes in the .ready

[jQuery] nested tabs

Does anybody know about a lightweight nested tab solution? I don't need any easing gimmicks. I also stumbled over ajaxtabs (http:// www.dynamicdrive.com/dynamicindex17/ajaxtabscontent/ajaxtabs_suppliment2.htm) Thank you!