function resizePhoto(id, w, h) {
    if ($(id).width() > w) {
        $(id).width(w);
    }
    if ($(id).height() > h) {
        $(id).height(h);
    }
}

random = function(min, max, exact) {
    var native_random = Math.random;
    if (arguments.length === 0) {
        return native_random();
    } else if (arguments.length === 1) {
        max = min;
        min = 0;
    }
    var range = min + (native_random() * (max - min));
    return exact === void (0) ? Math.round(range) : range.toFixed(exact);
};

var shareButton = {
    url: location.href,
    title: '',
    description: '',

    init: function (data) {
        if (typeof (data.url) != 'undefined')
            this.url = data.url;
        if (typeof (data.title) != 'undefined')
            this.title = data.title;
        if (typeof (data.description) != 'undefined')
            this.description = data.description;
    },

    bind: function (data) {
        this.init(data);

        $('#shareBtn_sina').attr('title', '分享到新浪微博').click(function () { shareButton.toSina(); });
        $('#shareBtn_nest').attr('title', '分享到网易微博').click(function () { shareButton.toNest(); });
        $('#shareBtn_tencent').attr('title', '分享到腾讯微博').click(function () { shareButton.toTencent(); });
        $('#shareBtn_renren').attr('title', '分享到人人网').click(function () { shareButton.toXiaonei(); });
        $('#shareBtn_kaixin').attr('title', '分享到开心网').click(function () { shareButton.toKaixin(); });
        $('#shareBtn_douban').attr('title', '分享到豆瓣网').click(function () { shareButton.toDouban(); });
        $('#shareBtn_163').attr('title', '分享到网易梦幻人生').click(function () { shareButton.toNetease(); });
        $('#shareBtn_qzone').attr('title', '分享到Qzone').click(function () { shareButton.toQzone(); });
    },

    toTencent: function () {
        var shareUrl = 'http://v.t.qq.com/share/share.php?';
        var appKey = '';
        shareUrl += 'url=' + encodeURIComponent(this.url) + '&appkey=' + appKey + '&title=' + encodeURIComponent(this.title);
        toshare();
        window.open(shareUrl);
    },

    toNest: function () {
        var shareUrl = 'http://t.163.com/article/user/checkLogin.do?';
        shareUrl += 'link=' + encodeURIComponent(this.url) + '&source=&info=' + encodeURIComponent(this.title) + ' ' + encodeURIComponent(this.url);
        toshare();
        window.open(shareUrl);
    },

    toXiaonei: function () {
        var shareUrl = 'http://share.renren.com/share/buttonshare.do?';
        shareUrl += 'link=' + encodeURIComponent(this.url);
        shareUrl += '&title=' + encodeURIComponent(this.title);
        toshare();
        window.open(shareUrl);
    },

    toSina: function () {
        var shareUrl = 'http://v.t.sina.com.cn/share/share.php?';
        shareUrl += 'url=' + encodeURIComponent(this.url);
        shareUrl += '&title=' + encodeURIComponent(this.title);
        shareUrl += '&pic=';
        toshare();
        window.open(shareUrl);
    },

    toKaixin: function () {
        var shareUrl = 'http://www.kaixin001.com/~repaste/repaste.php?';
        shareUrl += 'rurl=' + encodeURIComponent(this.url);
        shareUrl += '&rtitle=' + encodeURIComponent(this.title);
        shareUrl += '&rcontent=' + encodeURIComponent(this.description);
        toshare();
        window.open(shareUrl);
    },

    toDouban: function () {
        var shareUrl = 'http://www.douban.com/recommend/?';
        shareUrl += 'url=' + encodeURIComponent(this.url);
        shareUrl += '&title=' + encodeURIComponent(this.title);
        toshare();
        window.open(shareUrl);
    },

    toNetease: function () {
        var shareUrl = 'http://dream.163.com/share/link/?';
        shareUrl += 'url=' + encodeURIComponent(this.url);
        shareUrl += '&title=' + encodeURIComponent(this.title);
        shareUrl += '&content=' + encodeURIComponent(this.description);
        toshare();
        window.open(shareUrl);
    },

    toQzone: function () {
        var shareUrl = 'http://sns.qzone.qq.com/cgi-bin/qzshare/cgi_qzshare_onekey?url=' + encodeURIComponent(this.url);
        toshare();
        window.open(shareUrl);
    }
};

var utils = {
    getEvent: function(evt) {
        var evt = window.event || evt, c, cnt;
        if (!evt && window.Event) {
            c = arguments.callee;
            cnt = 0;
            while (c) {
                if ((evt = c.arguments[0]) && typeof (evt.srcElement) != "undefined") {
                    break;
                } else if (cnt > 9) {
                    break;
                }
                c = c.caller; ++cnt;
            }
        }
        return evt;
    },

    mouseX: function(evt) {
        evt = this.getEvent(evt);
        return evt.pageX || (evt.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft));
    },

    mouseY: function(evt) {
        evt = this.getEvent(evt);
        return evt.pageY || (evt.clientY + (document.documentElement.scrollTop || document.body.scrollTop));
    }
};

function createAds(data, options, index) {
    var defaults = {
        selectedClass: 'selected',
        normalClass: 'normal',
        prevClass: 'prev',
        nextClass: 'next',
        delay: 3000,
        auto: true
    };

    var options = $.extend(defaults, options);

    var ads = eval(data);
    var container = $(options.container);
    var btns = container.find(options.buttons);

    var hover = false;

    init();
    show(index);

    function init() {
        if (data != '') {
            var btns = '<a href="javascript:void(0)" class="contleft prev"></a>';
            for (var i = 0; i < ads.length; i++) {
                btns += '<a href="javascript:void(0)" class="' + options.normalClass + ' item" style="margin-top:13px;" index="' + i + '"></a>';
            }
            btns += '<a href="javascript:void(0)" class="contright next"></a>';

            $(options.buttons).html(btns);
            bindEvent();
            autoPlay();
        } else {
            container.hide();
        }
    };

    function bindEvent() {
        container.mouseover(function () { hover = true; }).mouseleave(function () { hover = false; });
        btns.children('.item').click(function () { show(btns.children('.item').index($(this))); });
        container.find('.' + options.prevClass).click(function () {
            var index = parseInt(btns.children('.' + options.selectedClass).attr('index')) - 1;
            if (index < 0) {
                index = 0;
                $(this).attr('disalbed', 'disabled');
            }
            show(index);
        });
        container.find('.' + options.nextClass).click(function () {
            var index = parseInt(btns.children('.' + options.selectedClass).attr('index')) + 1;
            if (index > btns.children('.item').length - 1) {
                index = btns.children('.item').length - 1;
                $(this).attr('disalbed', 'disabled');
            }
            show(index);
        });
    };

    function show(index) {
        if (ads.length > 0) {
            var data = ads[index];
            container.find('.photo').attr('src', data.img).attr('title', data.ititle);
            container.find('.title').attr('href', data.url).attr('title', data.ititle).attr('target', '_blank').html(data.title);
            container.find('.photo').parent('a').attr('href', data.url).attr('target', '_blank');
            btns.children('.item').removeClass(options.selectedClass).addClass(options.normalClass).eq(index).removeClass(options.normalClass).addClass(options.selectedClass);
        }
    };

    function autoPlay() {
        if (!options.auto) return;

        if (!hover) {
            var index = parseInt(btns.children('.' + options.selectedClass).attr('index')) + 1;
            if (index > btns.children('.item').length - 1 || isNaN(index)) {
                index = 0;
                btns.children('.' + options.prevClass).attr('disalbed', 'disabled');
            }
            show(index);
        }
        setTimeout(function () {
            autoPlay();
        }, options.delay);
    };
}