How to set control to new tab after completed validation in first tab?

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ASP.NET

Javascript

jQuery

Hi,
I have 3 tabs, in the first tab there are 5 validations in second tab 2 validators. I have used a group validator named 'valgrpMandatory'. On page load the control will be in first tab and whenever I click submit button the validation will work on all the tabs but the first tab is been showed. After inserting mandatory fields in first tab it cannot move to the next tab which is having validation for mandatory fields.

var Page_IsValid = false;
           Page_IsValid = window.Page_ClientValidate('valgrpMandatory');
           //Initialising Variables
           if (Page_IsValid == true) {
// values in all tabs on submit
}