add ;

src/main/webapp/resource/js/app/op.js

@@ -18,7 +18,7 @@
     var webSocket = null;  
     var url = "ws://http://112.65.124.86:8080/websocket/";  
     function connectSocket(loginUsername){
-    	url +=loginUsername
+    	url +=loginUsername;
     	alert("url:"+url);  
 //    	var timestamp=Date.parse(new Date());
     	webSocket=new WebSocket(url);