diff --git a/pages/user/userinfo/userinfo.js b/pages/user/userinfo/userinfo.js
index f6b0e5a..47ea48c 100644
--- a/pages/user/userinfo/userinfo.js
+++ b/pages/user/userinfo/userinfo.js
@@ -812,7 +812,7 @@ Page({
     }
     var identity_card = th.data.identity_card; //身份证
 
-    if (identity_card != "" && !(/(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(identity_card))) {
+    if (identity_card!=null && identity_card!=undefined &&  identity_card != "" && !(/(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(identity_card))) {
       getApp().my_warnning("身份证号码错误", 0, th);
       return false;
     }