jQuery: Calling javascript function after ajax request completed

 function DatalistFunction(argumentid) {
   set_minimum_points_for_session = value;
   SetSession(set_minimum_points_for_session);
   Redeem(argumentid);
    }

this is my code which i am calling on link button onclientclick event.

sometimes what happens is redeem function gets called first and then setsession function gets called. do i need to put some delay or something between the 2 functions, so that they run everytime in their own order, kindly suggest.

Thanks