fix

denglu.html

@@ -79,6 +79,7 @@
         </ul>
         <form class="form-inline my-2 my-lg-0 text-white" >
             <button class="btn btn-outline-dark my-2 my-sm-0 text-white" id="nowDateTimeSpan"></button>
+            <button class="btn btn-warning my-2 my-sm-0" onclick="logout()">登出</button>
             <button class="btn btn-success my-2 my-sm-0" type="submit">重新加载</button>
         </form>
     </div>