fixed:代码优化

@@ -55,22 +55,21 @@ function socketInit(options) {
      * @returns {WebSocket}
      */
     function socketConnect() {
-        console.log('server', server);
-        var instance = new WebSocket(server + '/im?param=' + param);
+        var socket = new WebSocket(server + '/im?param=' + param);
 
-        instance.onmessage = options.onMessage || function() {
-                console.log('received msg');
-            };
+        socket.onmessage = options.onMessage || function() {
+            console.log('received msg');
+        };
 
-        instance.onopen = options.onOpen || function() {
-                console.log('websocket is open');
-            };
+        socket.onopen = options.onOpen || function() {
+            console.log('websocket is open');
+        };
 
-        instance.onclose = options.onClose || function() {
-                console.log('websocket is closed');
-            };
+        socket.onclose = options.onClose || function() {
+            console.log('websocket is closed');
+        };
 
-        return instance;
+        return socket;
     }
 }