diff --git a/EuroTran/WebApp/Scripts/pages/ShowEasy/ONSiteMaintain_Upd.js b/EuroTran/WebApp/Scripts/pages/ShowEasy/ONSiteMaintain_Upd.js
index 790a1c2..6b9c848 100644
--- a/EuroTran/WebApp/Scripts/pages/ShowEasy/ONSiteMaintain_Upd.js
+++ b/EuroTran/WebApp/Scripts/pages/ShowEasy/ONSiteMaintain_Upd.js
@@ -1109,9 +1109,7 @@ var fnPageInit = function () {
         },
         //設置供應商聯絡人
         setSupplierContactorDrop = function () {
-          
-
-                return g_api.ConnectLite(canDo.QueryPrgId, "QuerySupplierContactorList", { LangID: ($('#LangID').val() || sLang), SupplierID: $('#SupplierID').val() }, function (res) {
+            return g_api.ConnectLite(canDo.QueryPrgId, "QuerySupplierContactorList", { LangID: ($('#LangID').val() || sLang), SupplierID: $('#SupplierID').val() }, function (res) {
                     if (res.RESULT) {
                         let saSupplier = res.DATA.rel;
                         if (saSupplier.length > 0) {
@@ -1119,12 +1117,13 @@ var fnPageInit = function () {
                             $('#Undertaker').append(createOptions(saSupplier, 'Guid', 'ContacterName', false)).select2();
                             $('#Undertaker').val([]);
                             $('#Undertaker').trigger('change');
+                        } else {
+                            $('#Undertaker').html("");
+                            $('#Undertaker').val([]);
+                            $('#Undertaker').trigger('change');
                         }
                     }
                 });
-            
-           
-            
         },
         //設置服務子類別
         setSubCategoryDrop = function () {