qBittorrent/src/webui/www/private/views/preferencesToolbar.html

<!-- preferences -->
<div class="toolbarTabs">
    <ul id="preferencesTabs" class="tab-menu">
        <li id="PrefDownloadsLink" class="selected"><a>QBT_TR(Downloads)QBT_TR[CONTEXT=OptionsDialog]</a></li>
        <li id="PrefConnectionLink"><a>QBT_TR(Connection)QBT_TR[CONTEXT=OptionsDialog]</a></li>
        <li id="PrefSpeedLink"><a>QBT_TR(Speed)QBT_TR[CONTEXT=OptionsDialog]</a></li>
        <li id="PrefBittorrentLink"><a>QBT_TR(BitTorrent)QBT_TR[CONTEXT=OptionsDialog]</a></li>
        <li id="PrefWebUILink"><a>QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]</a></li>
        <li id="PrefAdvancedLink"><a>QBT_TR(Advanced)QBT_TR[CONTEXT=OptionsDialog]</a></li>
    </ul>
    <div class="clear"></div>
</div>

<script>
    'use strict';

    (function() {
        // Tabs
        MochaUI.initializeTabs('preferencesTabs');

        $('PrefDownloadsLink').addEvent('click', function(e) {
            $$('.PrefTab').addClass('invisible');
            $('DownloadsTab').removeClass('invisible');
        });
        $('PrefConnectionLink').addEvent('click', function(e) {
            $$('.PrefTab').addClass('invisible');
            $('ConnectionTab').removeClass('invisible');
        });
        $('PrefSpeedLink').addEvent('click', function(e) {
            $$('.PrefTab').addClass('invisible');
            $('SpeedTab').removeClass('invisible');
        });
        $('PrefBittorrentLink').addEvent('click', function(e) {
            $$('.PrefTab').addClass('invisible');
            $('BittorrentTab').removeClass('invisible');
        });
        $('PrefWebUILink').addEvent('click', function(e) {
            $$('.PrefTab').addClass('invisible');
            $('WebUITab').removeClass('invisible');
        });
        $('PrefAdvancedLink').addEvent('click', function(e) {
            $$('.PrefTab').addClass('invisible');
            $('AdvancedTab').removeClass('invisible');
        });
    })();
</script>