// 图片滚动

(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,   // 需要显示图片的张数
            start:0,    // 
            scroll: 1,   //滚动的张书
            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);

$(function() {
    $("#bt-jq-TX010304").jCarouselLite({
        btnNext: ".bt-jq-TX010304-next",
        btnPrev: ".bt-jq-TX010304-prev"
    });
});
//复制此处的代码，修改后面数字，实现复用



$(document).ready(function(){
		$(".menu_tab a").click(function(){
			
    		$(this).addClass('tabactive ').parent('li')
			
					.siblings().children('a').removeClass('tabactive ');
		}); 
});
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