var current = 0;
var hold = false;

function show_tab(id, clicked)
{
    if (clicked) hold = true;
    else hold = false;
    var cur_tab = tabs[current];
    cur_tab.style.backgroundColor = '#d9fbff';
    cur_tab.style.color = '#000';
    var next_tab = tabs[id];
    next_tab.style.backgroundColor = '#00aeb6';
    next_tab.style.color = '#FFF';
    document.getElementById('wydkar'+current).style.display = 'none';
    document.getElementById('wydkar'+id).style.display = 'block';
    current = id;
}

function rotate_tabs()
{
    tabs = document.getElementById('wyd_tabs').getElementsByTagName('li');
    var ntabs = tabs.length;
    setInterval(
        function ()
        {
            var next;
            if (hold) next = current;
            else next = (current+1)%ntabs;
            show_tab(next, false);
        },
        9000);
}