var array1 = [];
$(document).ready(function () {
    $('input').change(function () {
        var formbox = $(this).attr('id');
        array1.push(formbox);
        console.log("you filled out box " + array1);
    });
    $('#submit').click(function () {
        console.log('tracked ' + array1);
        //alert('this is the order of boxes you filled out: ' + array1);
        _gaq.push(['_trackEvent', 'Form', 'completed', '"' + array1 + '"']);
    });
});

http://jsfiddle.net/nicomiceli/WK5eN/

Track user interactions with html forms

Form tracking with JS and Google Analytics

javascript, jquery

jQuery