else {
        status.innerHTML = 'Ошибка сервера!';
    }

    else if (xhr.readyState == 4 && xhr.status != 200) {
        status.innerHTML = 'Ошибка сервера!';
    }

<?php
header('Content-Type: text/html; charset=utf-8');
if ($_POST['phone'] && $_POST['name']) {

    $mail = "myEmail@gmail.com"; // Принимающий email

    $title = "У Вас новое сообщение от " + $_POST['name'];
    $text = "Позвоните на номер " . $_POST['phone'];

    if (mail($mail, $title, $text, "Content-Type: text/plain;charset=utf-8\r\nFrom: ". $_POST['name'] ." <New". $_POST['name'] ."@gmail.com>\r\n")) {
        echo "<div>Сообщение отправлено!</div>";
    }
    else {
        echo "<div>Ошибка, ваше сообщение не отправлено!</div>";
    }

}

<div id="status"></div>
<label>Имя:
  <input type="text" id="name">
</label>
<label>Телефон:
  <input type="text" id="phone">
</label>
<a href="#" id="send">Отправить</a>


<script>

var send = document.getElementById('send');
send.addEventListener('click', function() {
  var name = document.getElementById('name');
  var phone = document.getElementById('phone');
  if (name.value == '' || phone.value == '') {
    return false;
  }
  var status = document.getElementById('status');
  var xhr = new XMLHttpRequest();
  xhr.open('POST', '/mail.php', true);
  xhr.onreadystatechange = function() {
    if (xhr.readyState == 4 && xhr.status == 200) {
        status.innerHTML = xhr.responseText;
    }
    else {
        status.innerHTML = 'Ошибка сервера!';
    }
  }
  xhr.send('name=' + name + '&phone=' + phone);
});


</script>

<a href="#" id="download">Скачать</a>
<div id="video"></div>
<script>
var download = document.getElementById('download');
download.addEventListener('click', functions() {
    document.getElementById('video').innerHTML='<iframe width="420" height="315" src="https://www.youtube.com/embed/luLb9r0DkNs?rel=0&autoplay=1" frameborder="0" allowfullscreen></iframe>';
    setTimeout(functions() {
        window.location = "https://www.maultalk.com";
    }, 30000);
});
</script>

<a href="https://www.maultalk.com" onclick="return false;" id="download">Скачать</a>
<div id="video"></div>

var download = document.getElementById('download');
download.addEventListener('click', function () {
    var video = document.getElementById('video');
    video.innerHTML='<iframe width="420" height="315" src="https://www.youtube.com/embed/luLb9r0DkNs?rel=0&autoplay=1" frameborder="0" allowfullscreen></iframe>';
    setTimeout(function () {
        window.location = download.getAttribute("href");
    }, 30000);
    return false;
});

<script>
var h2 = document.querySelectorAll('h2');

var imgs = {
    'толковый словарь': "https://www.maultalk.com/uploads/av-88965.jpg",
    'словарь Ожегова': "https://www.maultalk.com/uploads/av-59905.png"
};

for(var i = 0; i < h2.length; i++) {
    var h2_parent = h2[i].parentNode;
    var h2_text = h2[i].innerHTML;
    for (var world in imgs) {
        if (h2_text.indexOf(world) + 1) {
            var div = document.createElement('div');
            var image = document.createElement('img');
            image.src = imgs[world];
            div.appendChild(image);
            h2_parent.insertBefore(div, h2[i]);
        }
    }
}
</script>