Unknown pseudo-class or pseudo-element 'even'

Unknown pseudo-class or pseudo-element 'even'

Hello,

I have the following:

  $("table tbody tr:even").addClass("Even");
  $("table tbody tr:odd").addClass("Odd");

But I get an error:

Warning: Unknown pseudo-class or pseudo-element 'even'.
Source File: http://localhost:55708/resource/list
Line: 0

Warning: Unknown pseudo-class or pseudo-element 'odd'.
Source File: http://localhost:55708/resource/list
Line: 0

Am I doing something wrong?
How can I avoid this warning?

Thank You,
Miguel