diff --git a/modules/discussion.js b/modules/discussion.js
index c9fba57..47a3279 100644
--- a/modules/discussion.js
+++ b/modules/discussion.js
@@ -137,7 +137,7 @@ app.post('/article/:id/edit', async (req, res) => {
   }
 });
 
-app.get('/article/:id/delete', async (req, res) => {
+app.post('/article/:id/delete', async (req, res) => {
   try {
     if (!res.locals.user) throw new ErrorMessage('请登录后继续。', { '登录': syzoj.utils.makeUrl(['login'], { 'url': req.originalUrl }) });
 
@@ -192,7 +192,7 @@ app.post('/article/:id/comment', async (req, res) => {
   }
 });
 
-app.get('/article/:article_id/comment/:id/delete', async (req, res) => {
+app.post('/article/:article_id/comment/:id/delete', async (req, res) => {
   try {
     if (!res.locals.user) throw new ErrorMessage('请登录后继续。', { '登录': syzoj.utils.makeUrl(['login'], { 'url': req.originalUrl }) });
 
diff --git a/modules/problem.js b/modules/problem.js
index 9961334..7f80cdc 100644
--- a/modules/problem.js
+++ b/modules/problem.js
@@ -549,11 +549,11 @@ async function setPublic(req, res, is_public) {
   }
 }
 
-app.get('/problem/:id/public', async (req, res) => {
+app.post('/problem/:id/public', async (req, res) => {
   await setPublic(req, res, true);
 });
 
-app.get('/problem/:id/dis_public', async (req, res) => {
+app.post('/problem/:id/dis_public', async (req, res) => {
   await setPublic(req, res, false);
 });
 
@@ -697,7 +697,7 @@ app.post('/problem/:id/testdata/upload', app.multer.array('file'), async (req, r
   }
 });
 
-app.get('/problem/:id/testdata/delete/:filename', async (req, res) => {
+app.post('/problem/:id/testdata/delete/:filename', async (req, res) => {
   try {
     let id = parseInt(req.params.id);
     let problem = await Problem.fromID(id);
diff --git a/modules/submission.js b/modules/submission.js
index aa2e961..8b2e1ce 100644
--- a/modules/submission.js
+++ b/modules/submission.js
@@ -229,7 +229,7 @@ app.get('/submission/:id/ajax', async (req, res) => {
   }
 });
 
-app.get('/submission/:id/rejudge', async (req, res) => {
+app.post('/submission/:id/rejudge', async (req, res) => {
   try {
     let id = parseInt(req.params.id);
     let judge = await JudgeState.fromID(id);
diff --git a/modules/user.js b/modules/user.js
index 5a30c43..d14ccc6 100644
--- a/modules/user.js
+++ b/modules/user.js
@@ -76,7 +76,7 @@ app.get('/sign_up', async (req, res) => {
 });
 
 // Logout
-app.get('/logout', async (req, res) => {
+app.post('/logout', async (req, res) => {
   req.session.user_id = null;
   res.clearCookie('login');
   res.redirect(req.query.url || '/');
diff --git a/static/script.js b/static/script.js
new file mode 100644
index 0000000..9b62439
--- /dev/null
+++ b/static/script.js
@@ -0,0 +1,13 @@
+$(function () {
+  $('a[href-post]').click(function (e) {
+    e.preventDefault();
+
+    var form = document.createElement('form');
+    form.style.display = 'none';
+    form.method = 'post';
+    form.action = $(this).attr('href-post');
+    form.target = '_self';
+    document.body.appendChild(form);
+    form.submit();
+  });
+});
diff --git a/views/article.ejs b/views/article.ejs
index 3083dc7..f9070e8 100644
--- a/views/article.ejs
+++ b/views/article.ejs
@@ -25,7 +25,7 @@
               <i class="remove icon"></i>
               否
             </div>
-            <a class="ui green ok inverted button" href="<%= syzoj.utils.makeUrl(['article', article.id, 'delete']) %>">
+            <a class="ui green ok inverted button" href-post="<%= syzoj.utils.makeUrl(['article', article.id, 'delete']) %>">
               <i class="checkmark icon"></i>
               是
             </a>
@@ -65,7 +65,7 @@
                   <i class="remove icon"></i>
                   否
                 </div>
-                <a class="ui green ok inverted button" href="<%= syzoj.utils.makeUrl(['article', article.id, 'comment', comment.id, 'delete']) %>">
+                <a class="ui green ok inverted button" href-post="<%= syzoj.utils.makeUrl(['article', article.id, 'comment', comment.id, 'delete']) %>">
                   <i class="checkmark icon"></i>
                   是
                 </a>
diff --git a/views/footer.ejs b/views/footer.ejs
index 85ec1fd..1879604 100644
--- a/views/footer.ejs
+++ b/views/footer.ejs
@@ -7,10 +7,6 @@
 
 <script src="/libs/semantic-ui/semantic.min.js"></script>
 <script src="/libs/Chart.js/Chart.bundle.min.js"></script>
-<script type="text/javascript">
-$("#logout").click(function () {
-    window.location.href = <%- JSON.stringify(syzoj.utils.makeUrl(['logout'], { url: req.originalUrl })) %>;
-});
-</script>
+<script src="/script.js?20170708"></script>
 </body>
 </html>
diff --git a/views/header.ejs b/views/header.ejs
index a0c6606..6215ee6 100644
--- a/views/header.ejs
+++ b/views/header.ejs
@@ -34,7 +34,7 @@
                 <%= user.username %><% if (user.nameplate) { %><%- user.nameplate %><% } %> <i class="dropdown icon"></i>
                 <div class="menu">
                   <a class="item" href="<%= syzoj.utils.makeUrl(['user', user.id, 'edit']) %>"><i class="edit icon"></i>修改资料</a>
-                  <a class="item" href="#" id="logout"><i class="power icon"></i>注销</a>
+                  <a class="item" href-post="<%= syzoj.utils.makeUrl(['logout'], { url: req.originalUrl }) %>"><i class="power icon"></i>注销</a>
                 </div>
               </div>
               </a>
diff --git a/views/problem.ejs b/views/problem.ejs
index c93cca1..43834d1 100644
--- a/views/problem.ejs
+++ b/views/problem.ejs
@@ -106,9 +106,9 @@ div[class*=ace_br] {
           <% } %>
           <% if (problem.allowedManage) { %>
             <% if (problem.is_public) {  %>
-              <a class="small ui button" id="dis_public" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'dis_public']) %>">取消公开</a>
+              <a class="small ui button" id="dis_public" href-post="<%= syzoj.utils.makeUrl(['problem', problem.id, 'dis_public']) %>">取消公开</a>
             <% } else { %>
-              <a class="small ui button" id="public" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'public']) %>">公开</a>
+              <a class="small ui button" id="public" href-post="<%= syzoj.utils.makeUrl(['problem', problem.id, 'public']) %>">公开</a>
             <% } %>
           <% } %>
         </div>
diff --git a/views/problem_data.ejs b/views/problem_data.ejs
index 374956b..ac2969a 100644
--- a/views/problem_data.ejs
+++ b/views/problem_data.ejs
@@ -95,7 +95,7 @@ function getIcon(filename) {
                         <i class="remove icon"></i>
                         否
                       </div>
-                      <a class="ui green ok inverted button" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'testdata', 'delete', file.filename]) %>">
+                      <a class="ui green ok inverted button" href-post="<%= syzoj.utils.makeUrl(['problem', problem.id, 'testdata', 'delete', file.filename]) %>">
                         <i class="checkmark icon"></i>
                         是
                       </a>
diff --git a/views/submission_content.ejs b/views/submission_content.ejs
index 3ca2274..f9db6fb 100644
--- a/views/submission_content.ejs
+++ b/views/submission_content.ejs
@@ -92,7 +92,7 @@ else problemUrl = syzoj.utils.makeUrl(['problem', judge.problem_id]);
   <% if (judge.problem.type !== 'submit-answer' && judge.allowedSeeCode) { %>
     <div class="ui existing segment" style="position: relative; ">
       <% if (judge.allowedRejudge) { %>
-        <a id="rejudge-button" href="<%= syzoj.utils.makeUrl(['submission', judge.id, 'rejudge']) %>" class="ui button" style="position: absolute; top: 0px; right: -4px; border-top-left-radius: 0; border-bottom-right-radius: 0; <% if (judge.pending) { %>display: none; <% } %>">重新评测</a>
+        <a id="rejudge-button" href-post="<%= syzoj.utils.makeUrl(['submission', judge.id, 'rejudge']) %>" class="ui button" style="position: absolute; top: 0px; right: -4px; border-top-left-radius: 0; border-bottom-right-radius: 0; <% if (judge.pending) { %>display: none; <% } %>">重新评测</a>
       <% } %>
       <pre style="margin-top: 0; margin-bottom: 0; "><code id="code"><%- judge.code %></code></pre>
     </div>