How to use XMLHttpRequest in web service.js?

Hi, I’m testing one of the web service sample app on SmartTV (Web Service | Tizen Docs).
The service start/stop correctly, and it also works in background after web app exited. But I can’t use XMLHttpRequest in service.js, it throws exception “ReferenceError: XMLHttpRequest is not defined”. Can anyone tell me how to get around the issue?

Thanks in advance.
Bentao

It’s sorted.
I think It’d be good for new Tizen developer to know that Tizen web app uses webview runtime and web service uses Node JS.
Thanks.

What do you mean by “web service uses Node JS”? Im having the same problem, but cant figure out the problem.