[JAVASCRIPT]form submit전에 input 필드 추가 방법

var theForm = document.forms['orderBuy1'];

var input   = document.createElement('input');

 

input.type   = 'hidden';

input.id= 'cart_num'

input.name  = 'cart_num';

input.value  = num;

theForm.appendChild(input);

 

$('#orderBuy1').submit();

출처: https://tailsky.tistory.com/entry/form-submit전에-input-필드-추가-방법 [빌라책]