As far as I know, there is a readline() function, but it is a specific function for spidermonkey, it isn't a part of javascript.
Example:
1)readline-test.js:
print("Type some text and press <ENTER>:\t");
var userInput = readline();
print("User input: " + userInput);
2)js readline-test.js
For more information see https://developer.mozilla.org/en-US/docs/SpiderMonkey/Introduction_to_the_JavaScript_shell.