reg

<?php
header('Content-Type: text/html; charset=utf-8');
   include 'validation.php';

?>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<form method="POST" action="register.php">
    <input name="email" class='test' type="text" placeholder="Email" /><br/>
    <input name="log" class='test1' type="text" placeholder="Username" /><br/>
    <input name="pass" class='test2' type="password" placeholder="password" /> <br/>
    <input type="button" id='button' name="register" value="Send"-->
    <button type="submit" id="btn" name="register">Sends</button>
<div class="lol" style="border:1px solid black; height:50px;"> </div>
</form>


<?php
echo json_encode(array($errors[0]));

?>


<script>
$('#btn').click(function(){
    var user_test  = $('.test').val();
    var user_test1  = $('.test1').val();
    var user_test2  = $('.test2').val();

    console.log('rez');

  $.ajax({
    type: "POST",
    dataType: "json",
      data: {
                        "email":    user_test,
                        "pass":    user_test2,
                        "log":  user_test1
                    },
    url: "validation.php", .
    beforeSend: function() {
      // Перед отправкой выведем уведомление:
      $('.lol').html('<div>Подождите...</div>');
    },
    success:function(data) {
        var ydata = data;
        if(ydata == 'Введите эмайл'){
            console.log('lololololo');
        $('.lol').html('<div>Пожалуйста, заполните поле</div>').css('color','#FF7777');
        $('.test').css('border-color', '#FF3333');

    }else{
        $('.lol').html('<div>Ваш отзыв отправлен</div>').css('color', 'green');
        $('.test').css('border-color', '#A9A9A9');

  }

  }
});
});

</script>