1.提交序列化表单+参数:
var a = $.param({'address':address,'delivity':delivity,'payment':payment}) + '&' + $('#card_form').serialize();
2.提交多个序列化表单:
var form1 = $('#form1').serialize();
var form2 = $('#form2').serialize();
var form3 = $('#form3').serialize();
var a = $.extend({},form1,form2,form3);