<form id="registerForm" action="http://localhost//register.php" method="post">
  <fieldset align="center">
    <legend id="legendText">Register</legend>
    <p>Name:
      <input type="text" name="fname" value="" required autofocus maxlength="16"></p>
    <p>Last name:
      <input type="text" name="lname" value="" required maxlength="16"></p>
    <p>E-mail:
      <input type="email" name="mail" value="" placeholder="@mail.com" maxlength="32" required></p>
    <p>Age:
      <input type="number" name="age" value="" maxlength="2" max="99" maxlength="2" size="2" min="1" required></p>
    <p>Job:
      <input type="text" name="job" value="" maxlength="16" required></p>
      <table align="center" id="registerPwdAndUsrTable" border="1" width="30%">
        <tr>
          <td>
            <p>Username:
              <input type="text" name="username" value="" required  maxlength="16"></p>
          </td>
          <td>
            <p>Password:
              <input type="password" name="password" value="" required  maxlength="16"></p>
          </td>
        </tr>
      </table>
      <input form="registerForm" type="Submit" value="Εγγραφή">
      <input form="registerForm" type="Reset" value="Ακύρωση">
  </fieldset>
</form>