How to prevent contrlU using jquery

How to prevent contrlU using jquery

Hi ,
I want to prevent control+ukey .using jquery.
means anyone press control and u key it shouldn't be work.
i have code but it works only in firefox and explorer.
following is code
  1.  $(document).keypress("u", function (e) {
            if (e.ctrlKey) {

                return false;
            }
          
        });
why it is not working in chrome and how to correct it

Regards
Baiju