<script>
$(function() {
$(".send_form_4").on('submit', function(event) {
event.preventDefault();
var form_data = $(this).serialize();
$.ajax({
type: "POST",
url: "/integration.php",
data: form_data,
success: function() {
alert("Ваше сообщение отпрвлено!");
}
});
//winow.open("thank-you.php");
});
});
</script>