C# .NET - How to call Validations of user control on aspx page

Hi

I am having User control(.ascx) page,with 3 text boxes..now i want to apply Required field validator for them for validations..

now i am using this control on .aspx page...
On aspx page i have Submit Button..on click of submit button i want user controls validation should be checked..

so do i need to use jquery for that..if yes how to write???