(function($) {
    $.fn.jCarouselLite = function(o) {
        o = $.extend({btnPrev:null,btnNext:null,btnGo:null,mouseWheel:false,auto:null,speed:200,easing:null,vertical:false,circular:true,visible:3,start:0,scroll:1,pauseOnHover:false,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,paused = 0;
            if (o.circular) {
                ul.prepend(tLi.slice(tl - v - 1 + 1).clone()).append(tLi.slice(0, v).clone());
                o.start += v
            }
            o.pauseOnHover ? ul.hover(function() {
                paused = 1
            }, function() {
                paused = 0
            }) : "";
            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 = liSize * v;
            li.css({width:li.width(),height:li.height()});
            ul.css(sizeCss, ulSize + "px").css(animCss, -(curr * liSize));
            div.css(sizeCss, divSize + "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, 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)
                })
            }
            if (o.auto) {
                setInterval(function() {
                    go(curr + o.scroll)
                }, o.auto + o.speed)
            }
            function vis() {
                return li.slice(curr).slice(0, v)
            }

            function go(to) {
                if (!running && !paused) {
                    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.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);