https://oldlymevets.com/js/tabs.js

1$(document).ready(function () {
2    $('.simple-tab').each((index, tabCtrl) => {
3        // Add the "standalone-tabs" class to a .simple-tab root element to make it
4        // operate independently of any other tab sets in the same .main-section.
5        var syncTabs = !$(tabCtrl).hasClass('standalone-tabs');
6
7        $(tabCtrl).find('.tablink').each((index, tabLink) => {
8            $(tabLink).on('click', function (evt) {
9                evt.preventDefault();
10
11                // Handle the buttons first
12                $(tabCtrl).find('.tablink.active').removeClass('active');
13                if (syncTabs) { $(tabCtrl).closest('.main-section').find('.simple-tab:not(.standalone-tabs) .tablink.active').removeClass('active'); }
14                $(tabLink).addClass('active');
15
16                var id = index;
17                var active = $(tabCtrl).find('.tabcontent.active');
18                if (syncTabs) { active = $(tabCtrl).closest('.main-section').find('.simple-tab:not(.standalone-tabs) .tabcontent.active'); }
19                if (active.length !== 0 && active[0] != $(tabCtrl).find('.tabcontent')[id]) {
20                    $(active).removeClass('active');
21                }
22                $($(tabCtrl).find('.tabcontent')[id]).addClass('active');
23
24                if ($(tabCtrl).find('.tabcontent.active').length === 0) {
25                    $(tabCtrl).find('.tablink.active').removeClass('active');
26                }
27
28                return false;
29            });
30        });
31    });
32});