diff --git a/public/javascripts/course.js b/public/javascripts/course.js
index b5255f786..4e698e6f2 100644
--- a/public/javascripts/course.js
+++ b/public/javascripts/course.js
@@ -114,7 +114,7 @@ function regex_course_class_period()
     }
     else
     {
-        $("#course_class_period_notice").html("学时总数必须为数字");
+        $("#course_class_period_notice").html("学时总数必须为正整数");
         $("#course_class_period_notice").show();
         return false;
     }