(function ($) {
    $.fn.jCarouselLite = function (o) {
        o = $.extend({
            btnPrev: null,
            btnNext: null,
            btnGo: null,
            mouseWheel: false,
            auto: null,
            speed: 500,
            easing: null,
            vertical: false,
            circular: true,
            visible: 3,
            start: 0,
            scroll: 1,
            beforeStart: null,
            afterEnd: null
        }, o || {});
        return this.each(function () {
            var b = false,
                animCss = o.vertical ? "top" : "left",
                sizeCss = o.vertical ? "height" : "width";
            var c = $(this),
                ul = $("ul", c),
                tLi = $("li", ul),
                tl = tLi.size(),
                v = o.visible;
            if (o.circular) {
                    ul.prepend(tLi.slice(tl - v - 1 + 1).clone()).append(tLi.slice(0, v).clone());
                    o.start += v
                }
            var f = $("li", ul),
                itemLength = f.size(),
                curr = o.start;
            c.css("visibility", "visible");
            f.css({
                    overflow: "hidden",
                    float: o.vertical ? "none" : "left"
                });
            ul.css({
                    margin: "0",
                    padding: "0",
                    position: "relative",
                    "list-style-type": "none",
                    "z-index": "1"
                });
            c.css({
                    overflow: "hidden",
                    position: "relative",
                    "z-index": "2",
                    left: "0px"
                });
            var g = o.vertical ? height(f) : width(f);
            var h = g * itemLength;
            var j = g * v;
            f.css({
                    width: f.width(),
                    height: f.height()
                });
            ul.css(sizeCss, h + "px").css(animCss, -(curr * g));
            c.css(sizeCss, j + "px");
            if (o.btnPrev) $(o.btnPrev).click(function () {
                    return go(curr - o.scroll)
                });
            if (o.btnNext) $(o.btnNext).click(function () {
                    return go(curr + o.scroll)
                });
            if (o.btnGo) $.each(o.btnGo, function (i, a) {
                    $(a).click(function () {
                        return go(o.circular ? o.visible + i : i)
                    })
                });
            if (o.mouseWheel && c.mousewheel) c.mousewheel(function (e, d) {
                    return d > 0 ? go(curr - o.scroll) : go(curr + o.scroll)
                });
            if (o.auto) setInterval(function () {
                    go(curr + o.scroll)
                }, o.auto + o.speed);

            function vis() {
                    return f.slice(curr).slice(0, v)
                };

            function go(a) {
                    if (!b) {
                        if (o.beforeStart) o.beforeStart.call(this, vis());
                        if (o.circular) {
                            if (a <= o.start - v - 1) {
                                ul.css(animCss, -((itemLength - (v * 2)) * g) + "px");
                                curr = a == o.start - v - 1 ? itemLength - (v * 2) - 1 : itemLength - (v * 2) - o.scroll
                            } else if (a >= itemLength - v + 1) {
                                ul.css(animCss, -((v) * g) + "px");
                                curr = a == itemLength - v + 1 ? v + 1 : v + o.scroll
                            } else curr = a
                        } else {
                            if (a < 0 || a > itemLength - v) return;
                            else curr = a
                        }
                        b = true;
                        ul.animate(animCss == "left" ? {
                            left: -(curr * g)
                        } : {
                            top: -(curr * g)
                        }, o.speed, o.easing, function () {
                            if (o.afterEnd) o.afterEnd.call(this, vis());
                            b = false
                        });
                        if (!o.circular) {
                            $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
                            $((curr - o.scroll < 0 && o.btnPrev) || (curr + o.scroll > itemLength - v && o.btnNext) || []).addClass("disabled")
                        }
                    }
                    return false
                }
        })
    };

    function css(a, b) {
        return parseInt($.css(a[0], b)) || 0
    };

    function width(a) {
        return a[0].offsetWidth + css(a, 'marginLeft') + css(a, 'marginRight')
    };

    function height(a) {
        return a[0].offsetHeight + css(a, 'marginTop') + css(a, 'marginBottom')
    }
})(jQuery);