用js通过参数名获取url中的参数

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

转载于:https://www.cnblogs.com/publicpublic/p/JavaScript.html