document.addEventListener("DOMContentLoaded", function() {
document.querySelector("input[name='add7']").placeholder = "¼º¸í";
document.querySelector("input[name='add5']").placeholder = "ÀüÈ­¹øÈ£";
document.querySelector("input[name='receiver_email']").placeholder = "À̸ÞÀÏ";
document.querySelector("textarea[name='add6']").placeholder = "¹®ÀÇ»çÇ×";
});