Javascript获取URL参数值

 getQueryString: function (name) {
        var reg = new RegExp("(^|&)" + name.toLowerCase() + "=([^&]*)(&|$)");
        var r = window.location.search.substr(1).toLowerCase().match(reg);
        if (r != null) {
            return r[2].decodeCookieURI();
        }
        return null;
    }