It's not really a script when it is compiled, by the way; it is now an
application.

Here's some demo code that will echo out the complete commandline, the
location of the assembly, and each of the commandline arguments passed to
the assembly:

//argdemo.js
// compile with:
// jsc /t:exe /out:argdemo.exe /nologo argdemo.js

import System;
import System.Reflection;

var args = System.Environment.GetCommandLineArgs();
//Note that the calling executable is one of the arguments.
System.Console.WriteLine("Raw commandline is: {0}",
System.Environment.CommandLine);
var Assembly = System.Reflection.Assembly.GetExecutingAssembly();
System.Console.WriteLine("Location: {0}", Assembly.Location);

var i = -1;
for (var arg in args) {
System.Console.WriteLine("argument {0}: {1}", ++i, args(arg));
}