Problem with Tablesorter.js in updatepanel with conditional postback.

Hello Experts,
I have 2 updatepanels with conditional postbacks.
One for adding entry and one for the gridview to display the entry.Tablesorter plugin is applied to the gridview.
The problem is the tablesorter does not work when i postback.
The overcome this i used the following code.
  var currentSortDirection = 1;      var currentSortField = 1;   $(document).ready(function () {       //Sys.Application.add_load(pageLoad);    ...