$(document).ready(function () {
                                         var prm = Sys.WebForms.PageRequestManager.getInstance();
                                         prm.add_initializeRequest(InitializeRequest);
                                         prm.add_endRequest(EndRequest);

                                         // Place here the first init of the autocomplete
                                         InitAutoCompl3();  // in web user control
                                     });

                                     function InitializeRequest(sender, args) {
                                     }

                                     function EndRequest(sender, args) {
                                         // after update occur on UpdatePanel re-init the Autocomplete
                                         InitAutoCompl3();
                                     }