(function ($) {
    $.fn.jCarouselLite = function (o) {
        o = $.extend({
            btnPrev: null,
            btnNext: null,
            btnGo: null,
            mouseWheel: false,
            auto: null,
            hoverPause: false,
            fixedScale: false,
            fixborderbottom: false,
            speed: 200,
            easing: null,
            vertical: false,
            circular: true,
            visible: 3,
            start: 0,
            scroll: 1,
            beforeStart: null,
            afterEnd: null
        }, o || {});
        return this.each(function () {
            var running = false,
                animCss = o.vertical ? "top" : "left",
                sizeCss = o.vertical ? "height" : "width";
            var div = $(this),
                ul = $("ul", div),
                tLi = $("li", ul),
                tl = tLi.size(),
                v = o.visible;
            if (o.circular) {
                ul.prepend(tLi.slice(tl - v).clone()).append(tLi.slice(0, v).clone());
                o.start += v
            }
            var li = $("li", ul),
                itemLength = li.size(),
                curr = o.start;
            div.css("visibility", "visible");
            li.css({
                overflow: "hidden",
                float: o.vertical ? "none" : "left"
            });
            ul.css({
                margin: "0",
                padding: "0",
                position: "relative",
                "list-style-type": "none",
                "z-index": "1"
            });
            div.css({
                overflow: "hidden",
                position: "relative",
                "z-index": "2",
                left: "0px"
            });
            var liSize = o.vertical ? height(li) : width(li);
            var ulSize = liSize * itemLength;
            var divSize = 0;
            if (o.fixedScale) {
                $("li", ul).each(function (count) {
                    if (count < o.start + v && count > o.start - 1) divSize += $(this).outerHeight()
                });
                li.css({
                    width: li.width()
                })
            } else {
                divSize = liSize * v;
                li.css({
                    width: li.width(),
                    height: li.height()
                })
            }
            ul.css(sizeCss, ulSize + "px").css(animCss, -(curr * liSize));
            var addpixel=0;
            if(o.fixborderbottom) addpixel=1;
            div.css(sizeCss, divSize - addpixel + "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)
            });
            var $prt;
            if (o.btnGo) {
                $prt = $(o.btnGo[0]).parent();
                $(o.btnGo[o.start - 1]).addClass("curr");
                $.each(o.btnGo, function (i, val) {
                    $(val).click(function () {
                        return go(o.circular ? o.visible + i : i)
                    })
                });
            }
            if (o.mouseWheel && div.mousewheel) div.mousewheel(function (e, d) {
                return d > 0 ? go(curr - o.scroll) : go(curr + o.scroll)
            });
            var autoInterval;

            function startAuto() {
                stopAuto();
                autoInterval = setInterval(function () {
                    go(curr + o.scroll);
                }, o.auto + o.speed)
            };

            function stopAuto() {
                clearInterval(autoInterval)
            };
            if (o.auto) {
                if (o.hoverPause) {
                    div.hover(function () {
                        stopAuto()
                    }, function () {
                        startAuto()
                    })
                }
                startAuto()
            };

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

            function go(to) {
                if (!running) {
                    if (o.beforeStart) o.beforeStart.call(this, vis());
                    if (o.circular) {
                        if (to <= o.start - v - 1) {
                            ul.css(animCss, -((itemLength - (v * 2)) * liSize) + "px");
                            curr = to == o.start - v - 1 ? itemLength - (v * 2) - 1 : itemLength - (v * 2) - o.scroll
                        } else if (to >= itemLength - v + 1) {
                            ul.css(animCss, -((v) * liSize) + "px");
                            curr = to == itemLength - v + 1 ? v + 1 : v + o.scroll
                        } else curr = to
                    } else {
                        if (to < 0 || to > itemLength - v) return;
                        else curr = to
                    }
                    running = true;
                    ul.animate(animCss == "left" ? {
                        left: -(curr * liSize)
                    } : {
                        top: -(curr * liSize)
                    }, o.speed, o.easing, function () {
                        if (o.afterEnd) o.afterEnd.call(this, vis());
                        running = false
                    });
                    if (o.btnGo) {
                        $prt.children(".curr").removeClass("curr");
                        $(o.btnGo[curr == itemLength-1 ? 0 : curr - 1]).addClass("curr");
                    }
                    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(el, prop) {
        return parseInt($.css(el[0], prop)) || 0
    };

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

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