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;

    }