var ps_current = 0;
var promoSwitcherDuration = 3000;
var switchPromosTimer;

function switchPromos() {
    $('.mainPromos ul.mainPromo_nav li').not(":eq("+ps_current+")").removeClass("on")
    $('.mainPromos ul.mainPromo_nav li:eq('+ps_current+')').addClass("on");
	
    $('.mainPromos ul.mainPromo_content>li').not(":eq("+ps_current+")").removeClass("on")
    $('.mainPromos ul.mainPromo_content>li:eq('+ps_current+')').addClass("on");
	
}

function startPromosSwitcher() {
    ps_current = (ps_current == 2) ? 0 : ps_current+1;
    switchPromos();
}

function beginPromoSwitcher() {
    switchPromosTimer = setInterval(function() {
        startPromosSwitcher()
        }, promoSwitcherDuration);
	
    $('.mainPromos ul.mainPromo_nav li').click(function() {
        ps_current = $(this).prevAll().length;
        switchPromos();
        return false;
    });
	
    $(".mainPromos").hover(
        function () {
            clearInterval(switchPromosTimer);
        },
        function () {
            clearInterval(switchPromosTimer);
            switchPromosTimer = setInterval(function() {
                startPromosSwitcher()
                }, promoSwitcherDuration);
        }
        );
}