Coppermine Album Slideshow on thumbnail hover

<script src="https://code.jquery.com/jquery-3.1.0.min.js" ></script>
    <script>
        var slideshow;
        $('a.albums').hover(function(){
            var url = $(this).attr('href');
            var i = 0;
            if( $(this).find('img').attr('src').includes('thumb_nopic.png') )
                return;
            var thumbs = [];
            $.ajax({
               url: url,
               async:false,
               success: function(data) {
                   $("img.image.thumbnail", data).each(function() {
                      thumbs.push( $(this).attr("src").toString() );
                   });
               }
            });
            var _link = this;
            $(this).find('img').css({'background-image': 'url('+$(this).find("img").attr("src")+')', 'background-size': 'cover','object-position': '-99999px 99999px', 'transition': 'background-image .25s'});
            slideshow = setInterval(function(){
                $(_link).find('img').css({'background-image': 'url('+thumbs[i]+')'});
                if( i < thumbs.length-1)
                        i++;
                else i = 0;
            }, 1000);
        }, function(){
            clearInterval(slideshow);
        });
    </script>