diff --git a/orun/examples/cp.py b/orun/examples/cp.py
index 3127e38..210fe34 100644
--- a/orun/examples/cp.py
+++ b/orun/examples/cp.py
@@ -17,7 +17,7 @@ class MyApplication(cp.ExtApplication):
             'items': [{'xtype': 'button', 'text': 'Click Here', 'handler': button_click}],
             'buttons': [
                 {'text': 'OK', 'handler': js.FuncWithParams(ok_click, {'arg1': 1, 'arg2': 'val2'})},
-                {'text': 'Close', 'handler': js.function('this.up(\'window\').close()')}]})
+                {'text': 'Close', 'handler': str(js.function('this.up(\'window\').close()'))}]})
         wnd.show()
         wnd.setHeight(200)
 
diff --git a/orun/extjs/base.py b/orun/extjs/base.py
index 2e08897..0df7f1f 100644
--- a/orun/extjs/base.py
+++ b/orun/extjs/base.py
@@ -59,5 +59,5 @@ class Component(js.JsObject):
         pass
     
     def __str__(self):
-        s = json.dumps(self._js, default=js._encoder)
-        return re.sub(r'(":\s+)("(function[^"]+)")', r'\1\3', s)
+        s = json.dumps(self._js, default=js._encoder, indent=4)
+        return re.sub(r'("(handler|renderTo)":\s+)("([^"]+)")', r'\1\4', s)
diff --git a/orun/js.py b/orun/js.py
index 2314bd4..fccf3f1 100644
--- a/orun/js.py
+++ b/orun/js.py
@@ -19,9 +19,9 @@ def _encoder(o):
     elif isinstance(o, JsNode):
         return block(str(o))
     elif isinstance(o, types.FunctionType) and js_ajax:
-        return function(js_ajax(o))
+        return str(function(js_ajax(o)))
     elif isinstance(o, FuncWithParams):
-        return function(js_ajax(o.func, o.params))
+        return str(function(js_ajax(o.func, o.params)))
     
 def encode(o):
     if isinstance(o, JsNode):
@@ -34,7 +34,7 @@ def encode(o):
 # trick json serialize javascript block
 class JsBlock(str):
     def __new__(cls, *args, **kwargs):
-        obj = super(JsBlock, cls).__new__(cls, 'function () { %s }' % args[0])
+        obj = super(JsBlock, cls).__new__(cls, '%s' % args[0])
         obj.code = args[0]
         return obj