function getParameter()
  {
    var params = document.URL.split("?")[1];
    if (params != null)
    {
      try 
      {
        var vars = params.split("&"); 
 
          for (var i = 0; i < vars.length; i++) 
          {
            var pair = vars[i].split("=");
            if (pair[0] == "code") 
            {
              return pair[1];
            }
          } 

      } 
      catch (e) 
      {
        alert(e);
      }
    }
    return "no";
  }