Custom Homepage - Setup Question

[Rich S]

Greets, all:

I have the instructions from the WebDirect Guide in front of me and want to install a custom home page, and I have a hopefully simple question: I want to replace the default "landing" page with one that has our organization's log and a selection of buttons that, when clicked, will take visitors to the appropriate database. I "get" that I have to create the file in HTML, but before I cause myself endless hours of frustration, if I code radio buttons in the home page's HTML file, how will those buttons fire an FMP script when clicked?

I'm admittedly ignorant when it comes to coding web pages, so my density is in the ozone. TIA for your help.