1 files changed, 14 insertions, 4 deletions

diff --git a/src/svg.js b/src/svg.js
index eb5f348..d0e4188 100644
--- a/src/svg.js
+++ b/src/svg.js
@@ -13,19 +13,29 @@ this.svg = function(element) {
 
 // The main wrapping element
 this.SVG = {
-  // Default namespaces
+  /* default namespaces */
   ns:    'http://www.w3.org/2000/svg',
   xlink: 'http://www.w3.org/1999/xlink',
-  // Defs id sequence
+  
+  /* defs id sequence */
   did: 0,
+  
   // Method for element creation
   create: function(element) {
     return document.createElementNS(this.ns, element);
   },
   // Method for extending objects
   extend: function(object, module) {
-    for (var key in module)
-      object.prototype[key] = module[key];
+    /* extend all container modules */
+    if (object === SVG.Container)
+      ('Clip Defs Doc Gradient Group Mask Nested Pattern').split(' ').forEach(function(m) {
+        if (SVG[m])
+          SVG.extend(SVG[m], module);
+      });
+    /* extend given module */
+    else
+      for (var key in module)
+        object.prototype[key] = module[key];
   }
   
 };
\ No newline at end of file