I just discovered this again on an old CD. It is an in-browser HTML editor of sorts I wrote in around 2000 to help my company with some HTML for emails (I think).
The amazing thing is that the editor part still works, and you can try it out in the browser now.
Here's the mistake I made. The code only checks if
document.layers is defined, so in today's browser world the changes don't get applied as neither is true any longer.
I hope you have some fun and feel some happiness about what we can choose from today seeing this :)