We use the original RWD social share see picture
We have add the LinkedIn Icon and we have open sharing.phtml but we do not know what to insert in the a href=""
<a href="<?php ?>" target="_blank" title="<?php echo Mage::helper('core')->quoteEscape($this->__('Share on LinkedIn')) ?>" class="link-linkedin"><?php echo $this->__('Share on LinkedIn') ?></a>
Do we need JS?
Module is not a possibility for us.