diff --git a/app/views/applied_project/_applied_join_project.html.erb b/app/views/applied_project/_applied_join_project.html.erb
index f8401b1e..60340a94 100644
--- a/app/views/applied_project/_applied_join_project.html.erb
+++ b/app/views/applied_project/_applied_join_project.html.erb
@@ -9,12 +9,12 @@
             <% if @is_teacher && @is_teacher == 1 %>
                 <li class="clearfix mb10 none">
                   <label class="panel-form-label fl">项目邀请码：</label>
-                  <input type="text" style="width: 285px;" class="input-60-40 fl" name="invite_code" value="<%=@project.invite_code %>" placeholder="请输入六位项目邀请码">
+                  <input type="text" style="width: 285px;" class="input-60-40 fl" name="invite_code" value="<%=@project.invite_code %>" placeholder="请输入六位项目邀请码" maxlength="6">
                 </li>
             <% else %>
                 <li class="clearfix mb10">
                   <label class="panel-form-label fl">项目邀请码：</label>
-                  <input type="text" style="width: 285px;" class="input-60-40 fl" name="invite_code" placeholder="请输入六位项目邀请码">
+                  <input type="text" style="width: 285px;" class="input-60-40 fl" name="invite_code" placeholder="请输入六位项目邀请码" maxlength="6">
                   <div class="cl"></div>
                 </li>
             <% end %>
diff --git a/app/views/layouts/_logined_header.html.erb b/app/views/layouts/_logined_header.html.erb
index 0ce03673..b583b8b3 100644
--- a/app/views/layouts/_logined_header.html.erb
+++ b/app/views/layouts/_logined_header.html.erb
@@ -90,14 +90,13 @@
           <li><%= link_to '新建项目', new_project_path() %></li>
         </ul>
         <ul class="fl with50 edu-txt-center">
-          <li>
-            <% if User.current.profile_completed? %>
-              <%= link_to "加入课堂", join_private_courses_path, :remote => true %>
-            <% else %>
-              <%= link_to "加入课堂", 'javascript:void(0)', onclick: 'showUserProfileModal()' %>
-            <% end %>
-          </li>
-<!--          <li><%#= link_to "加入项目", applied_join_project_path, :remote => true %></li>-->
+          <% if User.current.profile_completed? %>
+            <li><%= link_to "加入课堂", join_private_courses_path, :remote => true %></li>
+            <li><%= link_to "加入项目", applied_join_project_path, :remote => true %></li>
+          <% else %>
+            <li><%= link_to "加入课堂", 'javascript:void(0)', onclick: 'showUserProfileModal()' %></li>
+            <li><%= link_to "加入项目", 'javascript:void(0)', onclick: 'showUserProfileModal()' %></li>
+          <% end %>
         </ul>
       </div>
     </div>
diff --git a/app/views/layouts/_unlogin_header.html.erb b/app/views/layouts/_unlogin_header.html.erb
index 9121732b..87e2912b 100644
--- a/app/views/layouts/_unlogin_header.html.erb
+++ b/app/views/layouts/_unlogin_header.html.erb
@@ -75,7 +75,7 @@
         </ul>
         <ul class="fl with50 edu-txt-center">
           <li><%= link_to "加入课堂", signin_path %></li>
-<!--          <li><%#= link_to "加入项目", applied_join_project_path, :remote => true %></li>-->
+          <li><%= link_to "加入项目", signin_path %></li>
         </ul>
       </div>
     </div>