Qualtrics completion code javascript

completion_code_page.js

var unloadEvent;
var listener;

Qualtrics.SurveyEngine.addOnload(function () {
    'use strict';

    // initially hides completion code
    $j('#completion-code').hide();

    var code = '${e://Field/mturk_code_part_1}';
    var suffix = '3781';
    var showCode = function () {
        $j('#completion-code').html(codeDisplayStr).show();
        $j('#show-button').hide();
    };
    var codeParts = [code.substring(0, 3), code.substring(3), suffix];
    var codeDisplayStr = codeParts.join('-');

    // Shows button that user will need to click to get completion code.
    $j('#show-button').click(showCode);

    // Temporarily prevents user from going to next screen.
    perts.temporarilyBlockNavigation(
        "Write down your completion code before moving on. If you do not copy " +
        "your completion code, you may not be able to get credit for this " +
        "assignment.",
        20
    );

    // Create a pop-up message if user closes their window too soon.

    var leavingMessage = "Are you sure you wrote down your completion code? " +
                         "You cannot return to this page.";
    // Figure out the right unload event to use for this device.
    if (/iPhone|iPad|iPod/i.test(navigator.userAgent)) {
        // iOS doesn't have a onbeforeunload event, but you can detect
        // navigation away from the page. Use an alert(), which will block JS
        // and give us a chance to show them a message first. They won't have
        // an option to cancel their navigation (unlike onbeforeunload), so add
        // the code to the alert window directly.
        unloadEvent = 'pagehide';
        listener = function (evt) {
            alert(leavingMessage + "\n\nYour code is: " + codeDisplayStr);
        };
    } else {
        unloadEvent = 'beforeunload';
        listener = function (event) {
            event.returnValue = leavingMessage;
            return leavingMessage;
        };
    }
    // Attach the popup to the unload event.
    window.addEventListener(unloadEvent, listener, false);
});

Qualtrics.SurveyEngine.addOnUnload(function () {
    'use strict';
    // If the user clicks the next button after waiting for the 20 seconds,
    // like they're supposed to, remove the popup.
    window.removeEventListener(unloadEvent, listener, false);
});

Nice work! Do you know how I can load this into a qualtrics survey?