WebBrowser.Document.InvokeScript() does not work if javascript method is defined within a namespace

Hi everybody,

For some reason I am unable to invoke a javascript method via the WebBrowser.Document.InvokeScript() method  if the JS method is contained within a namespace.

If my html page contains the following JS method

<script type="text/javascript">      

      function foo(myvalue) {                        
           ...      

      }

</script>

then I am able to invoke it without any problems from C# by calling browser.Document.InvokeScript("foo", new object[] {value}).

However, if my JS method is defined with a namespace like this

 <script type="text/javascript">

         MyNameSpace = window.MyNameSpace || {};
         MyNameSpace.foo= function(myvalue)  {
                                    ...            
 }

</script>

then browser.Document.InvokeScript("MyNameSpace.foo", new object[] {value}) does not have any effect. When I invoke the method via the Chrome console it works fine in both cases, so I am wondering if my C# call is valid. Thoughts?

Your help would be much appreciated.

Thanks,

Oliver