var $status = $('#status');
/**
 * When the form is submitted, begin checking status periodically.
 * Note that this is NOT long-polling--that's when the server waits to respond until something changed. 
 * In a prod env, I recommend using a websockets library with a long-polling fall-back for older broswers--socket.io is a gentleman's choice)
 */
$('form').on('submit', function() {
    var longPoll = setInterval(function () {
        $.get('/checkstatus').then(function (status) {
            $status.text(status);

            //when it's done, stop annoying the server
            if (parseInt(status) === 100) {
                clearInterval(longPoll);
            }
        });
    }, 500);
});