diff --git a/views/admin_raw.ejs b/views/admin_raw.ejs
index 09555ec..33a7171 100644
--- a/views/admin_raw.ejs
+++ b/views/admin_raw.ejs
@@ -19,11 +19,13 @@ window.onEditorLoaded(function () {
   $('form').on('submit', function () {
     input.val(editor.getValue());
   });
+
+  $('#submit_button').removeClass('disabled');
 });
 </script>
 
 <div style="text-align: center; ">
-  <button class="ui blue labeled icon button"><i class="ui edit icon"></i>提交</button>
+  <button id="submit_button" class="ui disabled blue labeled icon button"><i class="ui edit icon"></i>提交</button>
 </div>
 </form>
 <% include admin_footer %>
diff --git a/views/article.ejs b/views/article.ejs
index da36438..3386e33 100644
--- a/views/article.ejs
+++ b/views/article.ejs
@@ -102,7 +102,7 @@
       </div>
       <input type="hidden" name="comment">
       <div style="text-align: center; ">
-      <button type="submit" class="ui labeled submit icon button">
+      <button id="submit_button" type="submit" class="ui disabled labeled submit icon button">
         <i class="icon edit"></i> 回复
       </button>
       </div>
@@ -119,6 +119,8 @@
           var input = document.getElementsByName(name)[0];
           editor.editor = window.createMarkdownEditor(editorElement, editor.defaultValue, input);
         }
+
+        $('#submit_button').removeClass('disabled');
       });
     </script>      
   <% } %>
diff --git a/views/article_edit.ejs b/views/article_edit.ejs
index 3f2fe87..a424515 100644
--- a/views/article_edit.ejs
+++ b/views/article_edit.ejs
@@ -40,7 +40,7 @@
       <div id="pv-content" class="font-content"></div>
     </div>
     <div style="text-align: center; ">
-    <button type="submit" class="ui labeled submit icon button">
+    <button id="submit_button" type="submit" class="ui disabled labeled submit icon button">
       <i class="icon edit"></i> 提交
     </button>
     </div>
@@ -59,6 +59,8 @@ window.onEditorLoaded(function () {
     var input = document.getElementsByName(name)[0];
     editor.editor = window.createMarkdownEditor(editorElement, editor.defaultValue, input);
   }
+
+  $('#submit_button').removeClass('disabled');
 });
 
 $(function () {
diff --git a/views/contest_edit.ejs b/views/contest_edit.ejs
index ffe8d80..6615ec6 100644
--- a/views/contest_edit.ejs
+++ b/views/contest_edit.ejs
@@ -89,7 +89,7 @@
                 <label><span style="visibility: hidden; ">　</span></label>
               </div>
             </div>
-            <div style="text-align: center; "><button type="submit" class="ui labeled icon blue button"><i class="ui edit icon"></i>提交</button></div>
+            <div style="text-align: center; "><button id="submit_button" type="submit" class="ui disabled labeled icon blue button"><i class="ui edit icon"></i>提交</button></div>
           </div>
         </form>
 <script>
@@ -105,6 +105,8 @@ window.onEditorLoaded(function () {
     var input = document.getElementsByName(name)[0];
     editor.editor = window.createMarkdownEditor(editorElement, editor.defaultValue, input);
   }
+
+  $('#submit_button').removeClass('disabled');
 });
 
 $(function () {
diff --git a/views/problem_edit.ejs b/views/problem_edit.ejs
index ab7d1bd..28b9898 100644
--- a/views/problem_edit.ejs
+++ b/views/problem_edit.ejs
@@ -97,7 +97,7 @@
       </div>
       <% if (problem.allowedEdit) { %>
       <div style="text-align: center; ">
-      <button type="submit" class="ui labeled submit icon button">
+      <button type="submit" id="submit_button" class="ui disabled labeled submit icon button">
         <i class="icon edit"></i> 提交
       </button>
       </div>
@@ -120,6 +120,8 @@ window.onEditorLoaded(function () {
     var input = document.getElementsByName(name)[0];
     editor.editor = window.createMarkdownEditor(editorElement, editor.defaultValue, input);
   }
+
+  $('#submit_button').removeClass('disabled');
 });
 
 $(function () {
diff --git a/views/user_edit.ejs b/views/user_edit.ejs
index 08166b3..583dad0 100644
--- a/views/user_edit.ejs
+++ b/views/user_edit.ejs
@@ -87,7 +87,7 @@
         </div>
       </div>
       <div style="text-align: center; margin-top: 30px; ">
-        <button type="submit" class="ui blue labeled icon button"><i class="ui icon edit"></i>修改</button>
+        <button id="submit_button" type="submit" class="ui disabled blue labeled icon button"><i class="ui icon edit"></i>修改</button>
         <a href="<%= syzoj.utils.makeUrl(['user', edited_user.id]) %>" class="ui labeled icon button"><i class="ui icon angle left"></i>返回</a>
       </div>
       </div>
@@ -114,6 +114,8 @@ window.onEditorLoaded(function () {
     var input = document.getElementsByName(name)[0];
     editor.editor = window.createMarkdownEditor(editorElement, editor.defaultValue, input);
   }
+
+  $('#submit_button').removeClass('disabled');
 });
 
 function make_md5(tag) {