获取参数等等

  var util = {
            /**
             * 获取url参数.
             * @param {String} [name] 参数名称，无此参数时返回所有参数
             * @return {String|Object} name存在时返回相应的值，否则返回所有参数
             */
            getUrlParam: function (name) {
                var url = window.location.search.substr(1)||window.location.hash.substr(1);
                if (!url) {
                    return '';
                }
                if (name) {
                    var value = new RegExp('(?:^|&)' + name + '=([^&]*)(&|$)', 'g').exec(url);
                    return util.htmlEncodeAll(value && window.decodeURIComponent(value[1]) || '');
                }
                var result = {};
                var reg = /(?:^|&)([^&=]+)=([^&]*)(?=(&|$))/g;
                var item;
                /* jshint boss: true */
                while (item = reg.exec(url)) {
                    result[item[1]] = util.htmlEncodeAll(window.decodeURIComponent(item[2]));
                }
                return result;
            },
            /**
             * 过滤html中的特殊符号
             * @param  {String} [e] 待过滤的html
             * @return {String}  返回过滤后的html
             */
            htmlEncodeAll: function (e) {
                return null == e ? "" : e.replace(/\</g, "&lt;").replace(/\>/g, "&gt;").replace(/\&/g, "&amp;").replace(/"/g, "&quot;").replace(/'/g, "'");
            },
            /**
             * 添加script.
             * @param {String} url js url
             * @param {Function} [onload] 加载成功回调
             * @param {Function} [onerror] 加载失败回调
             * @return {HTMLElement} script引用
             */
            addScript: function (url, onload, onerror) {
                var script = document.createElement('script');
                if (onload) {
                    script.onload = function () {
                        onload(script);
                    };
                }
                script.onerror = function () {
                    if (onerror) {
                        onerror(script);
                    } else if (onload) {
                        onload(script);
                    }
                };
                script.src = url;
                document.head.appendChild(script);
                return script;
            },
            /**
             * 复制对象属性.
             * @param {Object} toObj 复制到此对象
             * @param {Object} fromObj 要复制的对象
             */
            extend: function (toObj, fromObj) {
                for (var key in fromObj) {
                    if (fromObj[key] !== 'undefined') {
                        toObj[key] = fromObj[key];
                    }
                }
            },
            // Check if documentElement already has a given class.
            hasClass: function (node, className) {
                var regex;
                regex = new RegExp(className, 'i');
                return node.className.match(regex);
            },

            // Add one or more CSS classes to the <html> element.
            addClass: function (node, className) {
                var currentClassNames = null;
                if (!this.hasClass(node, className)) {
                    currentClassNames = node.className.replace(/^\s+|\s+$/g, '');
                    node.className = currentClassNames + " " + className;
                }
            },

            // Remove single CSS class from the <html> element.
            removeClass: function (node, className) {
                if (this.hasClass(node, className)) {
                    node.className = node.className.replace(" " + className, "");
                }
            },
            /**
             * 为url添加变量.
             * @param {String} url
             * @param {String|Object} name
             *    为字符串类型时参数作为新增参数的名称，第三个参数不能缺省
             *    为对象类型时参数为要增加的参数集合，属性为参数名称，值为参数值
             * @param {String} value 变量值
             * @return {String} 新的url
             */
            urlAddParam: function (url, name, value) {
                // 分割url，arr[1] 为头部，arr[2]为参数，arr[3]为hash
                var arr = url.match(/([^\?#]*\??)([^#]*)?(#.*)?/);
                var prefix = arr[1];
                var param = arr[2];

                if (param) {
                    prefix += param + '&';
                } else if (arr[1].indexOf('?') === -1) {
                    prefix += '?';
                }
                var newParam = '';
                if (typeof name === 'object') {
                    for (var key in name) {
                        newParam += '&' + key + '=' + encodeURIComponent(name[key]);
                    }
                    newParam = newParam.substr(1);
                } else {
                    newParam = name + '=' + encodeURIComponent(value);
                }
                return prefix + newParam + (arr[3] || '');
            },
            /**
             *模拟a标签跳转
             *@param {string} url 要跳转的url
             *@param {Boolean} isReplace 是否替换当前页
             */
            locationRedirect: function (url, isReplace) {
                if (isReplace) {
                    this.locationReplace(url);
                }
                if (os.ios) {
                    var $lr = $("#locationRedirect"),
                        ev = document.createEvent('HTMLEvents');
                    ev.initEvent('click', false, true);
                    if ($lr.length) {
                        $lr.attr("href", url);
                    } else {
                        $lr = $('<a id="locationRedirect" href="' + url + '" style="display:none;"></a>');
                        $(document.body).append($lr);
                    }
                    $lr[0].dispatchEvent(ev);
                } else {
                    window.location.href = url;
                }
            },
            /**
             * 修复iOS 9.0和9.1 下 replace后 再次跳转页面后调用back会回到前2个页面.
             * @param {String} url replace 的url
             */
            locationReplace: function (url) {
                if (os.ios && /^9\.[01]/.test(os.version)) {
                    history.replaceState({}, null, url);
                    location.reload();
                } else {
                    location.replace(url);
                }
            },
        };
获取参数等等

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