You're gonna at least have to set up the HTML page(s), and if the page(s) aren't going to be run from a web server, convert everything to either hard coded HTML or use Javascript for dynamic content. If you're running from a server, you can use some VBScript for the server-side scripting, but unless you're targeting an IE-only audience, you'll need to change programming on the client-side to Javascript.
No matter which way you go, you have some serious rewriting ahead of you because you're converting from a standalone format to something that displays inside another program that uses its own formatting codes and syntax.
Lee