diff --git a/lib/client/keyBinding.js b/lib/client/keyBinding.js
index 871b93d7..894d25e9 100644
--- a/lib/client/keyBinding.js
+++ b/lib/client/keyBinding.js
@@ -12,8 +12,8 @@ CloudCommander.keyBinding=(function(){
     };
     
     var lTabPanel   = {
-        left        : {},
-        right       : {}
+        left        : 0,
+        right       : 0
         
     };
     var key_event=function(event){