When you save the MS Word document as a webpage, then it in saved with the extension .htm and the format is HTML. When you click on this HTML file, it will open with your default browser.

Another option is:<BR><BR>A .js file which is an inelegant solution but is vanilla-html-workable.<BR><BR>And then you can go to ASP or PHP but those are way over the top for what you need. I'd do ...