README.rdoc in sinatra-cometio-0.0.3 vs README.rdoc in sinatra-cometio-0.0.4

@@ -72,18 +72,29 @@
 
 === Remove Event Listener
 
 Server Side
 
-  id = CometIO.on :chat do |data, from|
+  event_id = CometIO.on :chat do |data, from|
     puts "#{data} - from#{from}"
   end
-  CometIO.removeListener id
+  CometIO.removeListener event_id
 
 or
 
   CometIO.removeListener :chat  # remove all chat listener
 
+
+Client Side
+
+  var event_id = io.on("error", function(err){
+    console.error("CometIO error : "err);
+  });
+  io.removeListener(event_id);
+
+or
+
+  io.removeListener("error");  // remove all error listener
 
 == Sample App
 
 chat app