How to use fontawesome icons?

[SvePu]

Try this:

Content thankyoulike_button_add template:

<div id="tyl_btn_{$post['pid']}" class="postbit_buttons"><a class="add_tyl_button" href="thankyoulike.php?action=add&amp;pid={$post['pid']}&amp;my_post_key={$mybb->post_code}" onclick="return thankyoulike.add({$post['pid']}, {$post['tid']});" title="{$lang->add_tyl}" id="tyl_a{$post['pid']}"><span id="tyl_i{$post['pid']}"><i class="fa fa-thumbs-o-up"></i> {$lang->add_tyl}</span></a></div>

Content thankyoulike_button_del template:

<div id="tyl_btn_{$post['pid']}" class="postbit_buttons"><a class="del_tyl_button" href="thankyoulike.php?action=del&amp;pid={$post['pid']}&amp;my_post_key={$mybb->post_code}" onclick="return thankyoulike.del({$post['pid']}, {$post['tid']});" title="{$lang->del_tyl}" id="tyl_a{$post['pid']}"><span id="tyl_i{$post['pid']}"><i class="fa fa-thumbs-o-up fa-flip-vertical"></i> {$lang->del_tyl}</span></a></div>