I have a form that works in .asp. (see below)

I'd like to know how to make it work as a macro in umbraco.

 
          <form action="http://www.testsite.com/testpage.php" target="_blank" method="get"><tbody><tr><td><p>Find a Church near You
            <p>
              <input id="postcode" type="text" size="17" value="" name="postcode">
              <input type="submit" value="Search">
            </td></tr></tbody></form>