</td><td>
<input type="submit" value="<?php echo __('Check availability') ?>" onclick='return checkUsername()'>
</td></tr>
<tr><td><?php echo __('Email:') ?></td><td>
</td><td>
<input type="submit" value="<?php echo __('Check availability') ?>" onclick='return checkUsername()'>
</td></tr>
<tr><td><?php echo __('Email:') ?></td><td>
<tr><td colspan="2" align="right">
<input type="submit" name="sub_btn" value="<?php echo __('Submit registration') ?>"
disabled="disabled" onclick='return validateRegForm()'>
<tr><td colspan="2" align="right">
<input type="submit" name="sub_btn" value="<?php echo __('Submit registration') ?>"
disabled="disabled" onclick='return validateRegForm()'>