minor fix of menu

web/index.html

@@ -66,7 +66,7 @@
                 <a class="item" data-id="9">海爾</a>
                 <a class="item" data-id="10">雪村</a>
             </div>
-            <button id="next" class="ts positive button">確認</button>
+            <button id="next" class="ts disabled positive button">確認</button>
         </div>
         <div class="ts segment" id="room" style="display: none;">
             <div class="ts action input">