diff --git a/src/main/webapp/static/js/comm.js b/src/main/webapp/static/js/comm.js
index ec9703d..8d74b6f 100644
--- a/src/main/webapp/static/js/comm.js
+++ b/src/main/webapp/static/js/comm.js
@@ -269,7 +269,7 @@ function getHisDay(days){
     var yesterday=new Date(time);
     var month=yesterday.getMonth();
     var day=yesterday.getDate();
-    yesterday=yesterday.getFullYear() + "-" + (yesterday.getMonth()> 9 ? (yesterday.getMonth() + 1) : "0" + (yesterday.getMonth() + 1)) + "-" +(yesterday.getDate()> 9 ? (yesterday.getDate()) : "0" + (yesterday.getDate()));
+    yesterday=yesterday.getFullYear() + "-" + (month >= 9 ? (month + 1) : "0" + (month + 1)) + "-" +(day> 9 ? (day) : "0" + (day));
     return yesterday;
 }