In this example, I use AJAX Tab and has RequiredFieldValidator in eacy tab. The challenge is I need to tell which validator is invalid and the container Tab is selected.
The parameter 0 is the RequiredFieldValidator , 1 is the tab control and 2 is the index

String js = string.Format(“if(document.getElementById(‘{0}’).isvalid ==false)$get(‘{1}’).control.set_activeTabIndex({2})”,cvlCategories.ClientID, tbcItemDetails.ClientID,1);
btnSave.Attributes.Add(“OnClick”, js);

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