Jelioxe ajax.php ye bunu yazdırıyom işte

echo $lastID = $_POST['id'];

ekrana bişi yazmıyo
console da da bunlar yazıyo

Uncaught TypeError: Cannot read property 'addEventListener' of null(…)(anonymous function) @ ajax.php:22i @ jquery.min.js:2fireWith @ jquery.min.js:2ready @ jquery.min.js:2J @ jquery.min.js:2
popup.js:7 Uncaught TypeError: Cannot read property 'getSelected' of undefined(…)(anonymous function) @ popup.js:7

popup.js:7 Uncaught TypeError: Cannot read property 'getSelected' of undefined(…)(anonymous function) @ popup.js:7