<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>title</title>
<style>
.message {
margin: 50px;
padding: 50px;
border: 3px double #333;
background: #eee;
text-align: center;
color: #333
}
</style>
<script language="javascript">
setTimeout(function() {
document.getElementById('message').remove();
}, 5000);
</script>
</head>
<body>
<h3 id='message' class='message'>
Ваше письмо успешно отправлено!
</h3>
</body>
</html><head></head>)<script language ="javascript">
setTimeout(function() {
$('#message).hide();
}, 5000);
</script><body></body>)<div id="message">YOU MESSAGE HERE</div>
Простой
