js change obj to param string

js 用會 {id:12, name:'user'} 來做data,

點可以好快咁變成 id=12&name=user 呢?

ajax call 時好好用的~!

var params = {id:12, name:'user'};

jquery:

http://api.jquery.com/jQuery.param/

$.param(params);

PS: space 會變做+

prototype:

http://api.prototypejs.org/language/Object/toQueryString/

Object.toQueryString(params);

PS: space 會變做%20