https://prulu.com/media/static/js/support.js

1function setSupportNavigation(itemNumber) {
2    //reset the navigation
3    $('.left-column .global-nav.signed-in ul li a').removeClass('selected');
4    $('.left-column .global-nav.signed-in .top').css('visibility', 'hidden');
5
6    if (itemNumber == 1) {
7        selectFirstNavItemSupport();
8    }
9    else {
10        if (itemNumber == 2) {
11            $('.contact-us-sub-nav a').addClass('selected');
12        }
13        else if (itemNumber == 3) {
14            $('.feedback-sub-nav a').addClass('selected');
15        }
16        else if (itemNumber == 4) {
17            $('.terms-sub-nav a').addClass('selected');
18        }
19        else if (itemNumber == 5) {
20            $('.privacy-sub-nav a').addClass('selected');
21        }
22    }
23}
24
25function selectFirstNavItemSupport() {
26    $('.left-column .global-nav ul li:first a').addClass('selected');
27    $('.left-column .global-nav .top').css('visibility', 'visible');
28
29    $('.left-column .global-nav ul li ul li a').removeClass('selected');
30}
31
32function updateFeedbackSubmitBtn() {
33   if ($('#feedback-form #nameTextBox').val() == '' ||
34         $('#feedback-form #emailTextBox').val() == '' ||
35         $('#feedback-form #messageTextArea').val() == '') {
36      $('#feedback-form .message-send-button').addClass('disabled');
37   } else {
38      $('#feedback-form .message-send-button').removeClass('disabled');
39   }
40}
41
42$(document).ready(function () {
43   $('#feedback-form input, #feedback-form textarea').bind('keyup input paste.mask', function(e) {updateFeedbackSubmitBtn();});
44});