Hi JT,
Welcome to QA! :D
Dejan hasn't replied to comments since May 2014, so I doubt you'll have any success contacting him directly. Otherwise, it's best practice to contact him directly through the comments and suggestions forum at the bottom of
his article.
I doubt he'll reply though, so let me try to help you out:
Step 1. Create a form online through
Google Forms. Have you done this yet?
Step 2. Once you're done, view a preview of the live Google Form by clicking "View Live Form".
Step 3. Use your browser's dev tools to view the DOM of this live Google Form. If you're using Chrome, you can do this by right-clicking each text-field/radio button and clicking "Inspect Element".
Step 4. In the code that appears, you will see the name values of each field, for example "entry_1402836733". It will be different for your form. This is how you get those values for your code :-)
Step 5. Create your own webpage using the code from Steps 4&5 on
his article.
Step 6. Change the example JS he gives so that you are using the entry names of your own form.
Step 7. You're done!
The basic idea is to trick Google's servers into thinking that your Google Form was submitted, when in reality you submitted something from your own code.
Let me know if this helps!