Hi Guys - I'm facing browser compatibilty issue with firefox and chrome, where as the application works fine with IE7.0 and 8.0.
  I'm making a call to webservice from javascript as below but the control never returns  in success,error and timeout functions.
WebService.GetContactDetails(CurrentContactID, Onsucess, Onerror, Ontimeout);
and the webmethod returns the data in JSON as below which is a valid one as I've validated it through  JSON validator. when I debugged the javascript  through firebug in firefox it throws validation error in response.get_object() method as Sys.ArgumentException: Sys.ArgumentException: Cannot deserialize. The data does not correspond to valid JSON. Parameter name: data.
{
    "d": {
        "__type": "ContactsDB.ContactView",
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