moodle/auth/cas/index_form.html

<table width="90%" border="0" cellspacing="10" cellpadding="5" align="center">
  <tr>
<?php if ($show_instructions) { ?>
    <td width="50%" class="headingblock">
      <p align="center"><b><font size="3"><?php  print_string("returningtosite") ?></font></b></p>
    </td>
    <td width="50%" class="headingblock">
      <p align="center"><b><font size="3"><?php  print_string("firsttime") ?></font></b></p>
    </td>
<?php } ?>
  </tr>
  <tr>
    <td width="50%" align="center" valign="top" class="generalbox">
      <p><?php print_string("loginusing") ?>:<br />
        (<?php print_string("cookiesenabled");?>) 
         <?php helpbutton("cookies", get_string("cookiesenabled"))?><br /><?php formerr($errormsg) ?>
      </p>
      <form action="index.php" method="post" id="login">
        <table border="0" align="center" style="font-size: small">
        <tr>
          <td width="100%">
            <input type="hidden" name="username" id="username" value="cas" />
            <input type="hidden" name="password" id="password" value="cas" />
            <input type="submit" value="<?php print_string("auth_cas_logincas", "auth") ?>" />
          </td>
        </tr>
        </table>
      </form>
<?php if ($CFG->guestloginbutton) {  ?>
      <hr width="80%" />
      <p><?php print_string("someallowguest") ?>:</p>
        <form action="index.php" method="post" id="guestlogin">
          <input type="hidden" name="username" value="guest" />
          <input type="hidden" name="password" value="guest" />
          <input type="submit" value="<?php print_string("loginguest") ?>" />
        </form>
<?php } ?>

<?php if (is_internal_auth() ) {
    $changepassword = "forgot_password.php";
    $changebuttonname = get_string("senddetails");
?>
      <hr width="80%" />
      <p><?php print_string("forgotten") ?></p> 
        <form action="<?php p($changepassword) ?>" method="get" id="changepassword">
          <input type="submit" value="<?php p($changebuttonname) ?>" />
        </form>
<?php } ?>

    </td>

<?php if ($show_instructions) { ?>
    <td width="50%" valign="top" class="generalbox">
<?php     switch ($CFG->auth) {
              case "email":
                 print_string("loginsteps", "", "signup.php");
?>
                 <div align="center">
                   <form action="signup.php" method="get" id="signup">
                   <input type="submit" value="<?php print_string("startsignup") ?>" />
                   </form>
                 </div>
<?php            break;
               case "none":
                 print_string("loginstepsnone");
                 break;
               default:
                 $authplugin = get_auth_plugin($CFG->auth);
                 echo format_text($CFG->auth_instructions);
                 if (!empty($authplugin->config->user_create) and method_exists($authplugin, 'user_create')) {
?>

                 <div align="center">
                    <form action="signup.php" method="get" id="signup">
                    <input type="submit" value="<?php print_string("startsignup") ?>" />
                    </form>
                 </div>

<?php            }
          }
?>
    </td></tr>
<?php } ?>
</table>