javascript获取网页地址栏的id

       //获取网页的uid
        (function ($) {
            $.getUrlParam = function (name) {
                var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
                var r = window.location.search.substr(1).match(reg);
                if (r != null) return unescape(r[2]); return null;
            }
        })(jQuery);
        console.log($.getUrlParam('id'));   //id为浏览器地址栏?id=之后的字符