ASP.NET

$("#personGroupID").autocomplete({ minLength: 3,
         multiple: true,
         mustMatch: true,
         autoFill: true,

         source: function (request, response) {
             currentvalue = this.term.split(', ');
             searchlength = currentvalue.length;
             //            if (searchlength == -1) {
             //                var theUrl = "/Pages/ITS/ITSLookUpService.aspx?Type=AddEditWorkItemDetails&Value=" + this.term.toUpperCase() + "&" + "QueryString=" + document.getElementById("ProjectSKHidden").value;
             //            }
             //            else {
             var theUrl = "/Pages/ITS/ITSLookUpService.aspx?Type=PersonGroup&Value=" + currentvalue[currentvalue.length - 1].toUpperCase();
             //            }


             $.ajax({
                 url: theUrl,
                 data: request,
                 dataType: "json",
                 type: "POST",
                 success: function (data) {
                     response(data);
                     //delegate back to autocomplete, but extract the last term
                     //                                        response($.ui.autocomplete.filter(
                     //                                          data, extractLast(request.term)));
                 }
             });

         },
         select: function (event, ui) {
             var terms = split(this.value);
             // remove the current input
             terms.pop();
             // add the selected item
             terms.push(ui.item.DESCRIPTION);
             // add placeholder to get the comma-and-space at the end
             terms.push("");
             //this.value = terms.join(", ");
             //$("#workItemID").val(this.value);
             var selectedvalue = document.getElementById("personGroupID").value;
             if (selectedvalue = "") {
                 document.getElementById("personGroupID").value = terms.join(", ");
             }
             else {
//here i am appending the selected data from table                 document.getElementById("personGroupID").value = selectedvalue + terms.join(", ");
             }
             //$("HiddenPersonGroup").val(ui.item.PRSG_SK);
             //$("AssignedPersonGroup").val(ui.item.DESCRIPTION);

             if (document.getElementById("HiddenPersonGroup").value != "") {

                 var selectedpersongroupsk = document.getElementById("HiddenPersonGroup").value.split(',');
                 var exist = false;
                 for (var i = 0; i < selectedpersongroupsk.length; i++) {
                     if (selectedpersongroupsk[i] == ui.item.PRSG_SK) {
                         exist = true;
                     }
                 }
                 if (!exist) {
                     document.getElementById("HiddenPersonGroup").value = document.getElementById("HiddenPersonGroup").value + "," + ui.item.PRSG_SK;
                     $("AssignedPersonGroup").val(this.personGroupID.value + "," + ui.item.DESCRIPTION);
                 }
             }
             else {
                 $("HiddenPersonGroup").val(ui.item.PRSG_SK);
                 $("AssignedPersonGroup").val(ui.item.DESCRIPTION);
             }


             return false;
         }