Your website is currently loading two versions of jQuery (1.7 and 1.11), causing an error in the order of your config.js loading. To fix this issue, first remove the outdated version of jQuery. Then, rearrange all your scripts to be placed at the bottom of the page in the following order:
<script src="js/jquery.min.js"></script>
<script src="js/jquery.dropotron.min.js"></script>
<script src="js/skel.min.js"></script>
<script src="js/skel-panels.min.js"></script>
<script src="featherlight.js" type="text/javascript" charset="utf-8"></script>
<script src="featherlight.gallery.js" type="text/javascript" charset="utf-8"></script>
<script src="js/config.js"></script>
<script>
$(document).ready(function(){
$('.gallery').featherlightGallery({
gallery: {
fadeIn: 300,
fadeOut: 300
},
openSpeed: 300,
closeSpeed: 300
});
$('.gallery2').featherlightGallery({
gallery: {
next: 'next »',
previous: '« previous'
},
variant: 'featherlight-gallery2'
});
});
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//stats.g.doubleclick.net/dc.js','ga');
</script>