diff --git a/app/templates/userpage_get.html b/app/templates/userpage_get.html
index 90c6114..e134d94 100644
--- a/app/templates/userpage_get.html
+++ b/app/templates/userpage_get.html
@@ -49,16 +49,12 @@
 {#        <div class="alert alert-warning" role="alert">Congratulations! {{ message }}</div>#}
 {#    {% endfor %}#}
 
-    {% if result_of_generate_article != "had read all articles" %}
         <button class="btn btn-success" id="load_next_article" onclick="load_next_article()"> 下一篇 Next Article </button>
-    {% endif %}
-    {% if session.get('visited_articles') and session.get('visited_articles')['index']>0 %}
-        <button class="btn btn-success" id="load_pre_article" onclick="load_pre_article()"> 上一篇 Previous Article </button>
-    {% endif %}
+        <button class="btn btn-success" id="load_pre_article" onclick="load_pre_article()" > 上一篇 Previous Article </button>
 
     <p><b>阅读文章并回答问题</b></p>
     <div id="text-content">
-        {% if result_of_generate_article == 'found' %}
+        <div id="found">
             <div class="alert alert-success" role="alert">According to your word list, your level is <span class="badge bg-success" id="user-level">{{ today_article["user_level"] }}</span>  and we have chosen an article with a difficulty level of <span class="badge bg-success" id="text_level">{{ today_article["text_level"] }}</span> for you.</div>
                 <p class="text-muted" id="date">Article added on: {{ today_article["date"] }}</p><br/>
             <div class="p-3 mb-2 bg-light text-dark"><br/>
@@ -78,15 +74,13 @@
                 <button onclick="toggle_visibility('answer');">ANSWER</button>
                 <div id="answer" style="display:none;">{{ today_article['answer'] }}</div><br/>
             </div>
-        {% elif result_of_generate_article == "not found" %}
-            <div class="alert alert-success" role="alert">
-                <p class="text-muted"><span class="badge bg-success">Notes:</span><br>No article is currently available for you. You can try again a few times or mark new words in the passage to improve your level.</p>
-            </div>
-        {% elif result_of_generate_article == "had read all articles" %}
-            <div class="alert alert-success" role="alert">
-                <p class="text-muted"><span class="badge bg-success">Notes:</span><br>You've read all the articles.</p>
-            </div>
-        {% endif %}
+        </div>
+        <div class="alert alert-success" role="alert" id="not_found" style="display:none;">
+            <p class="text-muted"><span class="badge bg-success">Notes:</span><br>No article is currently available for you. You can try again a few times or mark new words in the passage to improve your level.</p>
+        </div>
+        <div class="alert alert-success" role="alert" id="read_all" style="display:none;">
+            <p class="text-muted"><span class="badge bg-success">Notes:</span><br>You've read all the articles.</p>
+        </div>
     </div>
 
     <input type="checkbox" onclick="toggleHighlighting()" checked/>生词高亮
@@ -151,28 +145,20 @@
         <script src="{{ js }}"></script>
     {% endfor %}
 {% endif %}
-<script>
+<script type="text/javascript">
     function load_next_article(){
         $.ajax({
             url: '/get_next_article/{{username}}',
             dataType: 'json',
             success: function(data) {
-
                 // 更新页面内容
-                    if(data){
-                        $('#user_level').html(data['user_level']);
-                        $('#text_level').html(data["text_level"]);
-                        $('#date').html('Article added on: '+data["date"]);
-                        $('#article_title').html(data["article_title"]);
-                        $('#article').html(data["article_body"]);
-                        $('#source').html(data['source']);
-                        $('#question').html(data["question"]);
-                        $('#answer').html(data["answer"]);
-                    }
-
+                if(data['today_article']){
+                    update(data['today_article']);
+                    check_pre(data['visited_articles']);
+                    check_next(data['result_of_generate_article']);
+                }
             }
         });
-
     }
     function load_pre_article(){
         $.ajax({
@@ -180,19 +166,44 @@
             dataType: 'json',
             success: function(data) {
                 // 更新页面内容
-                if(data){
-                    $('#user_level').html(data['user_level']);
-                    $('#text_level').html(data["text_level"]);
-                    $('#date').html('Article added on: '+data["date"]);
-                    $('#article_title').html(data["article_title"]);
-                    $('#article').html(data["article_body"]);
-                    $('#source').html(data['source']);
-                    $('#question').html(data["question"]);
-                    $('#answer').html(data["answer"]);
+                if(data['today_article']){
+                    update(data['today_article']);
+                    check_pre(data['visited_articles']);
                 }
             }
         });
-        console.info({{visited_articles}})
+    }
+    function update(today_article){
+        $('#user-level').html(today_article['user_level']);
+        $('#text_level').html(today_article["text_level"]);
+        $('#date').html('Article added on: '+today_article["date"]);
+        $('#article_title').html(today_article["article_title"]);
+        $('#article').html(today_article["article_body"]);
+        $('#source').html(today_article['source']);
+        $('#question').html(today_article["question"]);
+        $('#answer').html(today_article["answer"]);
+    }
+<!-- 检查是否存在上一篇或下一篇，不存在则对应按钮隐藏-->
+    function check_pre(visited_articles){
+        if((visited_articles=='')||(visited_articles['index']<=0)){
+            $('#load_pre_article').hide();
+        }else{
+            $('#load_pre_article').show();
+        }
+    }
+    function check_next(result_of_generate_article){
+        if(result_of_generate_article == "found"){
+            $('#found').show();$('#not_found').hide();
+            $('#read_all').hide();
+        }else if(result_of_generate_article == "not found"){
+            $('#found').hide();
+            $('#not_found').show();
+            $('#read_all').hide();
+        }else{
+            $('#found').hide();
+            $('#not_found').hide();
+            $('#read_all').show();
+        }
     }
 </script>
 </body>
diff --git a/app/user_service.py b/app/user_service.py
index 3d7670d..2e5feed 100644
--- a/app/user_service.py
+++ b/app/user_service.py
@@ -32,7 +32,12 @@ def get_next_article(username):
         else:  # 当前不为“null”，直接 index+=1
             visited_articles["index"] += 1
         session["visited_articles"] = visited_articles
-        visited_articles, data, result_of_generate_article = get_today_article(user_freq_record, session.get('visited_articles'))
+        visited_articles, today_article, result_of_generate_article = get_today_article(user_freq_record, session.get('visited_articles'))
+        data = {
+            'visited_articles': visited_articles,
+            'today_article': today_article,
+            'result_of_generate_article': result_of_generate_article
+        }
     else:
         return 'Under construction'
     return json.dumps(data)
@@ -42,11 +47,19 @@ def get_pre_article(username):
     user_freq_record = path_prefix + 'static/frequency/' + 'frequency_%s.pickle' % (username)
     if request.method == 'GET':
         visited_articles = session.get("visited_articles")
-        visited_articles["index"] -= 1  # 上一篇，index-=1
-        if visited_articles['article_ids'][-1] == "null":  # 如果当前还是“null”，则将“null”pop出来
-            visited_articles['article_ids'].pop()
-        session["visited_articles"] = visited_articles
-        visited_articles, data, result_of_generate_article = get_today_article(user_freq_record, session.get('visited_articles'))
+        if(visited_articles["index"]==0):
+            data=''
+        else:
+            visited_articles["index"] -= 1  # 上一篇，index-=1
+            if visited_articles['article_ids'][-1] == "null":  # 如果当前还是“null”，则将“null”pop出来
+                visited_articles['article_ids'].pop()
+            session["visited_articles"] = visited_articles
+            visited_articles, today_article, result_of_generate_article = get_today_article(user_freq_record, session.get('visited_articles'))
+            data = {
+                'visited_articles': visited_articles,
+                'today_article': today_article,
+                'result_of_generate_article':result_of_generate_article
+            }
         return json.dumps(data)
 
 @userService.route("/<username>/<word>/unfamiliar", methods=['GET', 'POST'])
@@ -146,10 +159,6 @@ def userpage(username):
                                yml=Yaml.yml,
                                words=words)
 
-
-
-
-
 @userService.route("/<username>/mark", methods=['GET', 'POST'])
 def user_mark_word(username):
     '''