Further to my comment, what I mean by splitting up the sendMail.php (you will, of course, have to modify your main page javascript to accommodate a confirm response from your sendMail.php):
if(isset($_POST['data']) && is_array($_POST['data']) ) {
foreach($_POST['data'] as $data) { }
$datatList = implode(', ', $_POST['data']);
}
else
$datatList = $_POST['data'];
if(!isset($_POST['confirm'])) {
$name = strip_tags($_POST['name']);
$email = strip_tags($_POST['mail']);
$age = preg_replace('/[^0-9]/','',$_POST['age']);
$data = strip_tags($datatList);
$response="
<h2>Preview</h2>
<table>
<tr>
<td>NAME:</td><td>".$name.'</td>
</tr>
<tr>
<td>EMAIL:</td><td>'.$email.'</td>
</tr>
<tr>
<td>AGE:</td><td>'.$age.'</td>
</tr>
<tr>
<td>DATA:</td><td>'.$data.'</td>
</tr>
<tr>
<td colspan="2">
<form id="confirm" method="post" action="">
<input type="hidden" name="name" value="'.$name.'" />
<input type="hidden" name="mail" value="'.$email.'" />
<input type="hidden" name="age" value="'.$age.'" />
<input type="hidden" name="data" value="'.$data.'" />
<input type="submit" name="confirm" value="Confirm" />
</form>
</td>
</tr>
</table>';
echo json_encode(array("confirm"=>true, "message"=> $response));
}
else {
$send_for_address = "[email protected]";
$header = "From: [email protected]";
$messages = "Name: $_POST[name]\n";
$messages .= "Email: $_POST[mail]\n";
$messages .= "Age : $_POST[age]\n";
$messages .= "Work $datatList\n";
mail($send_for_address, $messages,$header);
mb_internal_encoding("UTF-8");
if (mail($send_for_address, $messages,$header)) {
$response = <<<HTML
<div class="alert">
<div class="alert-header"><div class="alert-remove layerOff">×</div></div>
<div class="alert-body fs0_7">
Thank you for your applicaion!
</div>
<div class="alert-footer">
<input type="button" value="OK" class="layerOff">
</div>
</div>
HTML;
echo json_encode(array("success"=>true, "message"=> $response));
}
}