What version of JS is available in 1s 7.7?

Question

JavaScript

The task is to fasten 1s 7.7
I found a miracle. Which parses JSON from 1c directly by connecting from the operating system JS
1C77_JSON_parser
And I thought. But you can try something on JS in 1s77. But the question is what version of JS will be available. Taking into account. What 1s can stand on WinXP and on Win7

Answer 1

The immediate question is why? As for versions, here is: JScript Version Information
(Do you remember that JScript is not JavaScript?)