My guess is you don't need to include jquery because it's included as a bundle. But you'll need to verify that.

>Thank you. I will look through the C# code to see where scripts could be loaded in ASP.NET web forms application.
>So far I removed everything from the "head" section of the Site.Master. Except jquery and jquery.maskedinput. But still to no avail.
>Next I will put the .js in the page where I am testing