Problem with functions and objects

Problem with functions and objects

Hello, i'm having a problem when i try to pass a object to a function

the code is:

    var $tr = $(this).parent().parent().parent();
    $.post("url.php", function($tr)
    {         
      $tr.remove();      
    }


But it just don't works, i think the solution is not hard, but i just try all that i know and nothing.

Thanks for the help
and sorry for the poor english