<form method="POST" action="">
<input id='button-name' type="submit" name="delete_clie" value='Удалить' class="red_but">
<input id='button-name' type="submit" name="edit_clie" value='Редактировать' class="red_but">
<input id='button-name' type="submit" name="add_clie" value='Добавить' class="red_but">
</form>

<?php 

    session_start();

    require "connect.php";

//
//Клиенты   ..Добавление
//

    if (isset($_POST['add_clie'])){
        $query = "INSERT INTO Clients (id_client, FIO, number_pass, Adress, Telefone) values ('$_POST[id_client]','$_POST[FIO]','$_POST[number_pass]','$_POST[Adress]','$_POST[Telefone]')";
    mysql_query($query);
}

//
//Редактирование
//

if(isset($_POST['edit_clie'])){
  $query="UPDATE Clients SET id_client='$_POST[id_client]', FIO='$_POST[FIO]', number_pass='$_POST[number_pass]', Adress='$_POST[Adress]', Telefone='$_POST[Telefone]' WHERE id_client='$_POST[id_client]'";
  $result = mysql_query($query);
  unset($row);  
}

//
//Удаление
//

if (isset($_POST['delete_clie'])){
    $query = "DELETE FROM Clients WHERE id_client='$_POST[id_client]'";
    mysql_query($query);
}

?>