thanks, now I understand!!
if I add another icon for exemple G+, I can replicate in the file "templateDetails"
<field name="googleplus" type="text" default="http://google.com/+joomfreak" size="30" label="googleplus URL " description="" />
and add in the file "index.php"
<?php if ($this->params->get('googleplus') != '') : ?>
<li><a target="_blank" id="googleplus" title="Visit us >params->get('googleplus') ?>">
<img src="<?php echo $this->baseurl ?>/templates/<?php echo $this->template ?>/images/social-icons/googleplus.png" alt="" />
</a>
</li>
<?php endif; ?>
The icon must be present in the path /templates/jf_creativia/images/social-icons
is all!
thanks a lot and sorry for my bad english
PS. perhaps it was simpler to use a module