[Solved] Insert TR before another

[Solved] Insert TR before another

Hi.
My users can delete rows from a table when calling that script:
        $('.removeimg').click(function() {
          var t = this.id;
          $("#tr_"+t).slideUp("slow", function () {
             $.post("removepersqurl.php", { id: t } );
         });

I now want to make a "undo" row where this row is deleted and I have no idea where to start.

Thanks for your answers.
Christian