diff --git a/inc/myco_objects.js b/inc/myco_objects.js
index 74ed9bf..fa5a126 100644
--- a/inc/myco_objects.js
+++ b/inc/myco_objects.js
@@ -84,6 +84,13 @@ function GroupList() {
     }
     return false;
   }
+
+  this.balances=function(fct) {
+    return this.each(function(idx,group) {
+      return group.balance();
+    });
+  }
+
 }
 
 function Group(name,data) {