(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,
            beforeStart: null,
            afterEnd: null,
			height:130,
			width:200,
			must:false
        },
        o || {});
        return this.each(function() {
            var b = false,
            animCss = o.vertical ? "top": "left",
            sizeCss = o.vertical ? "height": "width";
            var c = $(this),
			ul = $(".G-pic", c),
            tLi = $(".G-pic-item", 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 f = $(".G-pic-item", ul),
            itemLength = f.size(),
            curr = o.start;
			f.eq(curr).addClass("G-pic-item-active");
            c.css("visibility", "visible");
            f.css("float", o.vertical ? "none": "left").children().css("overflow", "hidden");
            ul.css("margin", "0").css("padding", "0").css("position", "relative").css("list-style-type", "none").css("z-index", "1");
            c.css("overflow", "hidden").css("position", "relative").css("z-index", "2").css("left", "0px");
			var _h=height(f)>0?height(f):o.height;
			var _w=width(f)>0?width(f):o.width;
			
            var g = o.vertical ? _h :_w;
			if(o.must)
			{
				g=o.vertical ? o.height :o.width;
			}
            var h = g * itemLength;
            var j = g * v;
			if(o.must)
			{
				f.css("width", o.width).css("height", o.height);
			}
			else{
				f.css("width", f.width()>0?f.width():_w).css("height", f.height()>0?f.height():_h);
			}
            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) 
			{var gd=setInterval(function() {
                go(curr + o.scroll)
            },
            o.speed);
			f.hover(function(){
				clearInterval(gd);
			},function(){
				gd=setInterval(function() {
                go(curr + o.scroll)
            },
            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");
                        $((curr - o.scroll < 0 && o.btnPrev) || (curr + o.scroll > itemLength - v && o.btnNext) || []).addClass("disabled")
                    }
					f.removeClass("G-pic-item-active").eq(curr).addClass("G-pic-item-active");
                }
                return false
            }
        })
    };
    function css(a, b) {
        return parseInt($.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);