diff --git a/index.html b/index.html
index 6339369..425ce78 100644
--- a/index.html
+++ b/index.html
@@ -55,7 +55,7 @@
         <div class="input-row">
           <!-- 改用 onclick，顺带阻止冒泡 -->
           <input type="text" id="userInput" placeholder="输入你的消息..." onclick="openChat(event)" />
-          <button onclick="sendMessage()">发送</button>
+          <button id="sendbutton" onclick="sendMessage()">发送</button>
         </div>
       </div>
 
diff --git a/javascape/chat.js b/javascape/chat.js
index 352fee2..0a22938 100644
--- a/javascape/chat.js
+++ b/javascape/chat.js
@@ -8,6 +8,7 @@ document.getElementById('userInput').addEventListener('keydown', function(event)
 // 控制聊天框显示和隐藏
 const chatBox = document.getElementById('chatContainer');
 const inputBox = document.getElementById('userInput');
+const sendBox = document.getElementById('sendbutton');
 
 // 点击输入框时打开聊天框
 function openChat(e) {
@@ -49,7 +50,7 @@ function toggleChat(show) {
 
 function outsideClickListener(event) {
   // 点击目标既不在聊天框也不在输入框里，就收起
-  if (!chatBox.contains(event.target) && !inputBox.contains(event.target)) {
+  if (!chatBox.contains(event.target) && !inputBox.contains(event.target) && !sendBox.contains(event.target)) {
     toggleChat(false);
   }
 }
\ No newline at end of file