length is null or not an object

Hi, I have a SharePoint 2010 Visual Web part, where I am using AjaxControlToolKit (version 3.0.30930.28736) Tab Container. But my Tab Container is inside an update panel. Everything was working ...

Id #14554 | Release: None | Updated: Feb 14, 2013 at 12:33 AM by venh123 | Created: Dec 14, 2011 at 3:55 PM by venh123

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