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

    }

var url = 'http://www.haigoutong.com/index.php?id=7'

console.log(GetQueryString("id"))