Untitled

<div class="divAnexos">
           <label for="anexos" class="label">Anexos:</label> &nbsp;
           <input type="file" id="pegarAnexo" multiple>
           <textarea id="anexos"></textarea>
           <button id="addAnexos" class="ui-state-default"> Anexar </button>
        </div>

document.getElementById('addAnexos').onclick = function () {
      document.getElementById('pegarAnexo').click();
   };
  $('#pegarAnexo').change(function (event) {
      tmppath = URL.createObjectURL(event.target.files[0]);
      console.log(tmppath);
      $('#anexos').html($(this).val());
   });

function enviarEmail($aUser, $aPass, $aPort, $aDestinatario, $aHost, $aAssunto, $aCorpo, $aArquivos = '', $aCopia = '') {

   $mail = new PHPMailer;
   $mail->isSMTP();
   $mail->CharSet = 'UTF-8';
   $mail->Host = $aHost;
   $mail->Port = $aPort;
   $mail->SMTPSecure = 'tls';
   $mail->SMTPAuth = true;
   $mail->Username = $aUser;
   $mail->Password = $aPass;
   $mail->setFrom($aUser);
   $mail->addAddress($aDestinatario);
   $mail->addAddress($aCopia);
   $mail->Subject = $aAssunto;
   $mail->Body = $aCorpo;
   $mail->addAttachment($aArquivos);

   if (!$mail->send()) {
      return false;
   } else {
      return true;
   }
}

<form id="myForm" action="comment.php" method="post">
    Name: <input type="text" name="name" />
    Comment: <textarea name="comment"></textarea>
    <input type="submit" value="Submit Comment" />
</form>

<html>
<head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script>
    <script src="http://malsup.github.com/jquery.form.js"></script>

    <script>
        // wait for the DOM to be loaded
        $(document).ready(function() {
            // bind 'myForm' and provide a simple callback function
            $('#myForm').ajaxForm(function() {
                alert("Thank you for your comment!");
            });
        });
    </script>
</head>

$_FILES['file']['tmp_name']

$mail->AddAttachment($_FILES['seuArquivo']['tmp_name'],
                     $_FILES['seuArquivo']['name']);