$.fn.accordion = function () {
    var a = $(this);
    var c = 3;
    var e = null;
    a.children("li").each(function (f) {
        $(this).css("left", f * 50)
    });
    function b(f) {
        a.children("li").eq(f).stop().animate({
            left: f * 53 + "px"
        }, 200);
        a.children("li").eq(f).nextAll().each(function (g) {
            $(this).stop().animate({
                left: 248 + f * 53 + g * 53 + "px"
            }, 200)
            a.children("li").eq(f).nextAll().removeClass('on');
        });
        a.children("li").eq(f).prevAll().each(function (g) {
            $(this).addClass('on');
            $(this).stop().animate({
                left: (f - g - 1) * 53 + "px"
            }, 200)
            a.children("li").eq(f).prevAll().removeClass('on');
        })
        a.children("li").eq(f).addClass('on');
        
    }
    a.children("li").mouseenter(function () {
        var f = a.children("li").index(this);
        c = f;
        b(f);
        clearTimeout(e);
        d()
    });
    function d() {
        e = setTimeout(function () {
            if (c >= 3) {
                c = 0
            } else {
                c++
            }
            b(c);
            d()
        }, 2000)
    }
    d()
};