(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,
            fade: false,

            pauseOnHover: true,
            
            beforeStart: null,
            afterEnd: null
        }, o || {});
        this.jCarouselLiteOptions = 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 && !o.fade) {
                ul.prepend(tLi.slice(tl - v - 1 + 1).clone())
			  .append(tLi.slice(0, v).clone());
                o.start += v;
            }
            else {
                //			o.circular = false;
            }

            // Set pause flag
            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));

            if (o.fade) {
                li.css({ position: 'absolute', opacity: 0.0, display: 'none' });
                $(li[0]).css({ 'opacity': 1.0, 'display': 'block' });
                ul.css({ width: li.width(), height: li.height(), left: '0', top: '0' });
            }

            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() {
                        if (o.auto) {
                            clearInterval(o.timer);
                            o.timer = setInterval(function() { go(curr + o.scroll); }, o.auto + o.speed);
                        }
                        return go(o.circular && !o.fade ? 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)
                o.timer = 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 && curr != to) {

                    var precurr = curr;

                    if (!o.fade) {
                        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;
                        }
                    }
                    else {
                        if (!o.circular && (to < 0 || to > itemLength - v)) { return; }
                        to = (to + itemLength) % itemLength;
                        $(li[to]).show();
                    }

                    if (o.beforeStart)
                        o.beforeStart.call(this, vis(), to + 1);

                    running = true;
                    if (!o.fade) {
                        ul.animate(
						animCss == "left" ? { left: -(curr * liSize)} : { top: -(curr * liSize) }, o.speed, o.easing,
						function() {
						    if (o.afterEnd)
						        o.afterEnd.call(this, vis(), precurr + 1);
						    running = false;
						}
					);
                    }
                    else {
                        $(li[curr]).animate(
						{ opacity: 0.0 },
						o.speed,
						o.easing,
						function() {
						    $(li[precurr]).hide();
						    if (o.afterEnd)
						        o.afterEnd.call(this, vis(), precurr + 1);
						    running = false;
						}
					);
                        $(li[to]).animate(
						{ opacity: 1.0 }, o.speed, o.easing
					);
                        curr = to;
                    }
                    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);