TIWCGJQAjaxOptions.OnJSonpCallback Property
Specify the callback function name for a JSONP request. This value will be used instead of the random name automatically generated by jQuery. It is preferable to let jQuery generate a unique name as it'll make it easier to manage the requests and provide callbacks and error handling. You may want to specify the callback when you want to enable better browser caching of GET requests. As of jQuery 1.5, you can also use a function for this setting, in which case the value of jsonpCallback is set to the return value of that function.
published property OnJSonpCallback: TIWCGJSonFunc index 19 read GetFuncValue write SetFuncValue stored IsFuncStored;