You should make the cursor snap to the first text box upon loading of the page

Can you make it not autocomplete text in the text field? Eg, type UK and it fills in UKraine ... nicer if it only auto completes when I click a result / select with arrows and press enter/tab.

Make the error page (select 1 country and click submit) much nicer, ideally inline javascript.

I'd make the results auto generate above the text fields, this way I can easily enter another two countries to calculate simply by pressing tab a few times.

It's also too hard to return back to the home page (assuming you don't do the above suggestion) -- how about a little image at the end of the sentence which when clicked takes you back to the homepage?

thats all I can think of right now - cool app!