diff --git a/index.html b/index.html
index de03d8c..6749c0d 100644
--- a/index.html
+++ b/index.html
@@ -8,6 +8,7 @@
     <script src="script.js"></script>
 </head>
 <body>
+    <p>WS: <span id="ws"></span> <button id="change-ws">Change WS</button></p>
     <p>UserID: <span id="userid"></span> <button id="copy-userid">Copy</button></p>
     
     <br>
diff --git a/script.js b/script.js
index b9388b4..0abdaa2 100644
--- a/script.js
+++ b/script.js
@@ -1,3 +1,8 @@
+let ws = null
+
+let wsAddress = "ws://localhost:"
+let wsPort = 3000
+
 window.onload = () => {
     const msg = document.getElementById("msg")
     const receiver = document.getElementById("receiver")
@@ -23,16 +28,29 @@ window.onload = () => {
         document.getElementById("receiver").value = ""
     }
 
+    document.getElementById("change-ws").onclick = () => {
+        if (wsPort === 3000) {
+            wsPort = 3001
+        } else {
+            wsPort = 3000
+        }
+
+        if (ws.readyState == 1) {
+            ws.close()
+        }
+    }
+    
     connectWS()
 }
 
-let ws = null
+
 
 function connectWS() {
-    ws = new WebSocket("ws://localhost:3000/")
+    ws = new WebSocket(wsAddress + wsPort)
 
     ws.onopen = () => {
         console.info("ws open", document.getElementById("userid"))
+        document.getElementById("ws").innerHTML = ws.url
     }
     
     ws.onmessage = (msg) => {
@@ -46,7 +64,9 @@ function connectWS() {
     }
     
     ws.onclose = (e) => {
-        console.log("ws closed", e.reason)
+        if (e.reason.code === 1005) return
+
+        console.log("ws closed", e)
         document.getElementById("userid").innerHTML = ""
         setTimeout(() => connectWS(), 1000)
     }
