const formData1 = new FormData( document.getElementById('form1') );
const formData2 = new FormData( document.getElementById('form2') );
for(const [key, value] of formData2.entries()) {
    formData1.append(key, value)
}
return formData1;

$("form").find('.success').css('display': 'block')
document.getElementById('overlay').style='visibility:hidden;opacity:0;transition:all 0.7s ease-out 0s';