[javascript] Javascript: 'window' is not defined

I'm trying to learn JavaScript, but the following code has been giving me a lot of trouble:

window.onload = function () {
    for ( var i = 0; i < seats.length; i++) {
        for ( var j = 0; j < seats.length; j++) {
            document.getElementById(getSeatId(i, j)).onclick = function(evt) {
                getSeatStatus(getSeatId(i, j));
            };
        }
    }
    document.getElementById("search").onclick = findSeat;
    document.getElementById("male_search").onclick = findMaleSeats;
    initSeats();
};

It is from an external JS file and it is the only file linked to the page. findSeat, findMaleSeats, getSeatId, and initSeats are all defined a little bit later in the file. When I double click this file, I get the following error:

Windows Script Host
Error: 'window' is not defined
Code: 800A1391

I already tried moving the code to other places in the file, assigning a different function (even an empty function) to window.onload and many other things. It just seems that my computer doesn't know what window is. And if I try to open the HTML in a browser the nothing loads (as one would expect).

Does someone know what is wrong with this?

The window object represents an open window in a browser. Since you are not running your code within a browser, but via Windows Script Host, the interpreter won't be able to find the window object, since it does not exist, since you're not within a web browser.

Trying to access an undefined variable will throw you a ReferenceError.

A solution to this is to use typeof:

if (typeof window === "undefined") {
  console.log("Oops, `window` is not defined")
}

or a try catch:

try { window } catch (err) {
  console.log("Oops, `window` is not defined")
}

While typeof window is probably the cleanest of the two, the try catch can still be useful in some cases.