function isOptional(field) {
    var opt = new Array(
		'txtConfirmPassword', 'txtAddress2', '__EVENTTARGET', '__EVENTARGUMENT', '__VIEWSTATE', '__EVENTVALIDATION');

    for (var k = 0; k < opt.length; k++) {
        if (opt[k] == field) return true;
    }
    return false;
}

function abandonForm(form_id) {
    var f = document.getElementById(form_id);
    var abandon = null;
    for (var i = 0; i < f.elements.length; i++) {
        if (!isOptional(f.elements[i].id) && f.elements[i].value == '') {
            abandon = f.elements[i].id;
            break;
        }
    }

    if (abandon != null) {
        pageTracker._trackPageview('/virtual/form-analysis/' + form_id + '/abandon/' + abandon);
    } else {
        //pageTracker._trackPageview('/virtual/form-analysis/' + form_id + '/success');
    }
}