<form action = "register.php" method = "post" name = "reg" id = "reg">
			<div class = "regst">
				Имя:<br/> <input type = "text" name = "firstname" maxlength = "16"/><br/>
			</div>
			<div class = "regst">
				Фамилия: <br/><input type = "text" name = "lastname" maxlength = "16"/><br/>
			</div>	
			<div class = "regst">
				Адрес электронной почты:<br<br/><input type = "text" name = "email" maxlength = "30"/><br/>
			</div>
            <div class = "regst">
				Логин:<br/> <input type = "text" name = "login" maxlength = "16"/><br/>
			</div>	
            <div class = "regst">
				Пароль: <b<br/><input type = "password" name = "passwrd" maxlength = "16"/><br/>
			</div>				
			<div class = "regst">
			<input type = "submit" value = "Зарегистрироваться">
			</div>
			</form>

$firstname = trim($firstname); 
    $lastname = trim($lastname); 
	$email = trim($email); 
	$login = trim($login); 
	$password = trim($password); 
	
	//echo "ВЫ ввели: $firstname, $lastname, $email, $login, $password";
	
	
require_once("condb.php");
	$connect = connect_db("visitors_db");
	$result = mysql_query("select *from table_visitors where login = '$login' and password_visitors  = '$password'");
		 
	if(!$result)
	{
		echo "Ошибка файла handle.php. поиск в sql";		
		exit;
	}
	if(mysql_num_rows($result) > 0)
	{
		echo "смените логин";
		exit;
	}
	else
	{
		$result = mysql_query("INSERT INTO table_visitors (login)
									  values ('$login')");
		if(!$result)
					echo "запись не прошла";
				else
					echo "успешно";
	}

$firstname = trim($_POST['firstname']);
$firstname = addslashes($_POST['firstname']);
$lastname = trim($_POST['lastname']);
$lastname = addslashes($_POST['lastname']);
$email = trim($_POST['email']);
$email = addslashes($_POST['email']);
$login = trim($_POST['login']);
$login = addslashes($_POST['login']);
$password = trim($_POST['password']);
$password = addslashes($_POST['password']);

//echo "ВЫ ввели: $firstname, $lastname, $email, $login, $password";
	
	
require_once("condb.php");
	$connect = connect_db("visitors_db");
	$result = mysql_query("select *from table_visitors where login = '$login' and password_visitors  = '$password'");
		 
	if(!$result)
	{
		echo "Ошибка файла handle.php. поиск в sql";		
		exit;
	}
	if(mysql_num_rows($result) > 0)
	{
		echo "смените логин";
		exit;
	}
$result2 = mysql_query("INSERT INTO table_visitors (login) values ('$login')");
		if(!$result2)    {echo "запись не прошла"; exit;}

echo "успешно";