diff -r 1b7289414d3c -r fca0475da9a7 client/js/main.js
--- a/client/js/main.js	Tue Apr 23 10:38:48 2013 +0200
+++ b/client/js/main.js	Tue Apr 23 17:08:42 2013 +0200
@@ -1,5 +1,5 @@
 /* 
- *  Copyright 2012 Institut de recherche et d'innovation 
+ *  Copyright 2012-2013 Institut de recherche et d'innovation 
  *  contributor(s) : Yves-Marie Haussonne, Raphael Velt, Samuel Huron
  *   
  *  contact@iri.centrepompidou.fr
@@ -96,12 +96,12 @@
             },_opts.auto_refresh)
         }
     }
-}
+};
 
 Rkns._BaseBin.prototype.destroy = function() {
     this.$.detach();
     this.renkan.resizeBins();
-}
+};
 
 /* Point of entry */
 
@@ -253,7 +253,7 @@
     this.$.find(".Rk-Bins-Search-Form").submit(function() {
         return false
     });
-}
+};
 
 Rkns.Renkan.prototype.template = Rkns._.template(
     '<% if (options.show_bins) { %><div class="Rk-Bins"><div class="Rk-Bins-Head"><h2 class="Rk-Bins-Title"><%- translate("Select contents:")%></h2>'
@@ -273,16 +273,16 @@
         return Rkns.i18n[this.options.language.substr(0,2)][_text];
     }
     return _text;
-}
+};
 
 Rkns.Renkan.prototype.onStatusChange = function() {
     this.renderer.onStatusChange();
-}
+};
 
 Rkns.Renkan.prototype.setSearchEngine = function(_key) {
     this.search_engine = this.search_engines[_key];
     this.$.find(".Rk-Search-Current").attr("class","Rk-Search-Current " + this.search_engine.getBgClass());
-}
+};
 
 Rkns.Renkan.prototype.resizeBins = function() {
     var _d = + this.$.find(".Rk-Bins-Head").outerHeight();
@@ -292,7 +292,7 @@
     this.$.find(".Rk-Bin-Main").css({
         height: this.$.find(".Rk-Bins").height() - _d
     });
-}
+};
 
 /* Utility functions */
 
@@ -341,17 +341,18 @@
     },
     inherit : function(_baseClass, _callbefore) {
         
-        var _class = function() {
+        var _class = function(_arg) {
             if (typeof _callbefore === "function") {
                 _callbefore.apply(this, Array.prototype.slice.call(arguments, 0));
             }
             _baseClass.apply(this, Array.prototype.slice.call(arguments, 0));
-            if (typeof this._init == "function") {
+            if (typeof this._init == "function" && !this._initialized) {
                 this._init.apply(this, Array.prototype.slice.call(arguments, 0));
+                this._initialized = true;
             }
         }
-        _class.prototype = new _baseClass();
+        Rkns._(_class.prototype).extend(_baseClass.prototype);
         return _class;
         
     }
-}
\ No newline at end of file
+};