How to call a WEB RFC from Persona 3.0

Hello,

I have created a webRFC and have enabled it to work over the internet.

When I enter the link in the browser, I am able to get the result.

But I am not able to figure out how to call the webrfc from Persona 3.0 and retrieve the json output.

I need to pass the user ID and get back the value.

I am referring the link http://scn.sap.com/community/gui/blog/2013/07/30/calling-rfcs-from-a-personas-script

But I am not able to see anything related to Call WebRFC in step 2 in the above document script screenshot.

Thanks and Regards,

Sajid