diff --git a/lib/client/contact.js b/lib/client/contact.js
index d4e588fe..79778550 100644
--- a/lib/client/contact.js
+++ b/lib/client/contact.js
@@ -5,7 +5,7 @@ var CloudCmd, Util, DOM, olark;
     
     CloudCmd.Contact = ContactProto;
     
-    function ContactProto(pCallBack) {
+    function ContactProto(callback) {
         var Contact = this,
             Images  = DOM.Images,
             Key     = CloudCmd.Key,
@@ -60,16 +60,16 @@ var CloudCmd, Util, DOM, olark;
                 init(Contact.hide);
         }
         
-        function listener(pEvent) {
+        function listener(event) {
             var ESC     = Key.ESC,
                 isBind  = Key.isBind(),
-                key     = pEvent.keyCode;
+                key     = event.keyCode;
             
             if (!isBind && key === ESC)
                 Contact.hide();
         }
         
-        init(pCallBack);
+        init(callback);
     }
     
 })(CloudCmd, Util, DOM);