redirect to another web page based on selection [on hold]

redirect to another web page based on selection [on hold]

I have 3 countries e.g. USA;INDIA;RUSSIA. I have their details (e.g.
POPULATION etc.) in for 3 months in HTML files like this:
USA0213.HTML; USA0313.HTML; ETC
INDIA0213.HTML; INDIA0313.HTML; ETC
RUSSIA0213.HTML; RUSSIA0313.HTML; ETC
How can I create a dropdown for the countries, month & year so that on
clicking the submit button I could open/navigate to the related HTML
files.