在本页提交内容后怎么实现这种提示？

$pdo=new PDO("mysql:host=localhost;dbname=t1","root","");$stmt=$pdo->prepare("insert into topic(tid,title,content,name,time)values(:tid,:title,:content,:name,now())");$stmt->execute($_POST);header("location:http://localhost/aaa.php");

$pdo=new PDO("mysql:host=localhost;dbname=t1","root","");$stmt=$pdo->prepare("insert into topic(tid,title,content,name,time)values(:tid,:title,:content,:name,now())");$stmt->execute($_POST);echo '<script type="text/javascript">alert("插入成功");window.location.href="http://localhost/aaa.php";</script>';