diff --git a/public/javascripts/homework.js b/public/javascripts/homework.js
index ca120df2f..f488465ca 100644
--- a/public/javascripts/homework.js
+++ b/public/javascripts/homework.js
@@ -92,7 +92,14 @@ $(function(){
 
                     test_post(i+1);
                 }
-            );
+            ).fail(function(xhr, status){
+                    if(status == 'timeout'){
+                        alert("您的答案超时了, 请检查代码是否存在死循环的错误.");
+                    } else {
+                        alert("测试失败,服务器出错.");
+                        return;
+                    }
+                });
         };
 
         test_post(1);