AJAX在GBK编码页面中传中文参数乱码如何解决？

解决方案：

mb_convert_encoding($brand_name, "GBK", "utf-8");

jQuery(form).ajaxSubmit({ 
url: "ajax.jsp?a=memberlogin", 
type: "post", 
dataType: "json", 
contentType: "application/x-www-form-urlencoded; charset=utf-8", 
success: showLoginResponse 
});