Hi,
I just created a tab container and put 2 tab panels inside the tab container. While running the website I am not getting any error but while in PostBack I am getting 'Handler was not added through the Sys.UI.DomEvent.addHandler' exception (refer to the image for this). There is not many solutions available for this. There is already seems to be an issue (http://ajaxcontroltoolkit.codeplex.com/workitem/26491) reported for this which says that issue is closed but I think this still persists.
![Image](http://snag.gy/lKxXE.jpg)
I just created a tab container and put 2 tab panels inside the tab container. While running the website I am not getting any error but while in PostBack I am getting 'Handler was not added through the Sys.UI.DomEvent.addHandler' exception (refer to the image for this). There is not many solutions available for this. There is already seems to be an issue (http://ajaxcontroltoolkit.codeplex.com/workitem/26491) reported for this which says that issue is closed but I think this still persists.
![Image](http://snag.gy/lKxXE.jpg)