diff --git a/pages/cart/cart_wk/cart_wk.js b/pages/cart/cart_wk/cart_wk.js
index 1e7ab55..1ede2a0 100644
--- a/pages/cart/cart_wk/cart_wk.js
+++ b/pages/cart/cart_wk/cart_wk.js
@@ -426,6 +426,7 @@ Page({
       th.calculate_wuliu();
     } else {
 
+      var order_prom_id=0;
       if (ord_prom) {
         order_prom_id = ord_prom['id'];
         switch (ord_prom['type']) {