/*官网右下角广告轮播js*/
(function($) {
    $.fn.flashSlider = function(options) {
        var options = $.extend({},
        $.fn.flashSlider.defaults, options);
        this.each(function() {
            var obj = $(this);
            var curr = 1;
            var $img = obj.find("img");
            var s = $img.length;
            var w = $img.eq(0).width();
            var h = $img.eq(0).height();
            var $flashelement = $("ul", obj);
            options.height == 0 ? obj.height(h) : obj.height(options.height);
            options.width == 0 ? obj.width(w) : obj.width(options.width);
            obj.css("overflow", "hidden");
            obj.css("position", "relative");
            $flashelement.css('width', s * w);
            if (!options.vertical) {
                $("li", obj).css('float', 'left')
            } else {
                $img.css('display', 'block')
            };
            if (options.controlsShow) {
                var navbtnhtml = '<div id="flashnvanum">';
                for (var i = 0; i < s; i++) {
                    navbtnhtml += '<span>' + (i + 1) + '</span>'
                }
                navbtnhtml += '</div>';
                obj.append(navbtnhtml);
                obj.find("#flashnvanum span").hover(function() {
                    var num = $(this).html();
                    flash(num, true)
                },
                function() {
                    timeout = setTimeout(function() {
                        flash((curr / 1 + 1), false)
                    },
                    options.pause / 4)
                })
            };
            function setcurrnum(index) {
                obj.find("#flashnvanum span").eq(index).addClass('on').siblings().removeClass('on')
            }
            function flash(index, clicked) {
                $flashelement.stop();
                var next = index == s ? 1 : index + 1;
                curr = index - 1;
                setcurrnum((index - 1));
                if (!options.vertical) {
                    p = ((index - 1) * w * -1);
                    $flashelement.animate({
                        marginLeft: p
                    },
                    options.speed, options.easing)
                } else {
                    p = ((index - 1) * h * -1);
                    $flashelement.animate({
                        marginTop: p
                    },
                    options.speed, options.easing)
                };
                if (clicked) {
                    clearTimeout(timeout)
                };
                if (options.auto && !clicked) {
                    timeout = setTimeout(function() {
                        flash(next, false)
                    },
                    options.speed + options.pause)
                }
            }
            var timeout;
            setcurrnum(0);
            if (options.auto) {
                timeout = setTimeout(function() {
                    flash(2, false)
                },
                options.pause)
            }
        })
    };
    $.fn.flashSlider.defaults = {
        controlsShow: true,
        vertical: false,
        speed: 800,
        auto: true,
        pause: 2000,
        easing: "swing",
        height: 0,
        width: 0
    }
})(jQuery);