I tried to validate my mod.html page for my activity aganist w3c validator, but I found that some <input> element haven't ending slash and last

<input type=hidden...

have name attribute value without double hyphoon ()

Here I paste how should be mod.html for me:

<!-- This page defines the form to create or edit an instance of this module -->

<!-- It is used from /course/mod.php. The whole instance is available as $form. -->

<?php

/// First we check that form variables have been initialised

if (!isset($form->name))

{ $form->name = ''; }

// More similar blocks go here...

?>

<form name=form method=post action=mod.php>

<center>

<table cellpadding=5>

<tr valign=top>

<td align=right><b><?php print_string(name) ?>:</b></td>

<td>

<input type=text name=name size=30 value=<?php p($form->name) ?> />

</td>

</tr>

<!-- More rows go in here... -->

<!-- The following line for Moodle 1.5 prints the visibility setting form element -->

<?php print_visible_setting($form); ?>

<!-- and if your module uses groups you would also have -->

<?php print_groupmode_setting($form); ?>

</table>

<!-- These hidden variables are always the same -->

<input type=hidden name=course value=<?php p($form->course) ?> />

<input type=hidden name=sesskey value=<?php p($form->sesskey) ?> />

<input type=hidden name=coursemodule value=<?php p($form->coursemodule) ?> />

<input type=hidden name=section value=<?php p($form->section) ?> />

<input type=hidden name=module value=<?php p($form->module) ?> />

<input type=hidden name=modulename value=<?php p($form->modulename) ?> />

<input type=hidden name=instance value=<?php p($form->instance) ?> />

<input type=hidden name=mode value=<?php p($form->mode) ?> />

<input type=submit value=<?php print_string(savechanges) ?> />

</center>

</form>