<?php $link="http://php.su/"; if ($_POST['numbers']=='12345'); { header ("Location: $link"); exit; } else if (isset($_POST['numbers'])){ echo "<script> alert('Неверный Ключ!'); </script>"; } ?> <center> <form action='' method="post"> <input type="text" name="numbers"> </form> <form action='' method="post"> <input type="submit" value=".: Ввод! :."> </form> <center>