multiple submit buttons

Hi all, I noticed this chunk of code in a site the other day: <input type="Submit" name="btn" value="Yes"> <input type="Submit" name="btn" value="No"> My GUESS is that if i click the "Yes" button, I magically get $btn = "Yes" as a var is the receieving PHP script. I was just about to test this, when I realised that (from what I can tell) multiple submits are not supported by CGI spec. So, even if it works on my browser/platform/server/php combination, can I be sure it'll work faithfully on all environments? Should I be worried about what the browser sends, or what PHP does with it, etc etc? Has anyone doen some serious testing on this? Good or bad stories? Justin French