$(document).ready(function(){
        
        $('.gallery_demo_unstyled').addClass('gallery_demo'); // adds new class name to maintain degradability
        
        $('ul.gallery_demo').galleria({
            history   : true, // activates the history object for bookmarking, back-button etc.
            clickNext : true, // helper for making the image clickable
            insert    : '#main_image', // the containing selector for our main image
            onImage   : function(image,caption,thumb) { // let's add some image effects for demonstration purposes
                
                // fade in the image & caption
                image.css('display','none').fadeIn(1000);
                caption.css('display','none').fadeIn(1000);
                
                // fetch the thumbnail container
                var _li = thumb.parents('li');
                
                // fade out inactive thumbnail
                _li.siblings().children('img.selected').fadeTo(500,0.3);
                
                // fade in active thumbnail
                thumb.fadeTo('fast',1).addClass('selected');
                
                // add a title for the clickable image
                image.attr('title','Next image >>');
            },
            onThumb : function(thumb) { // thumbnail effects goes here
                
                // fetch the thumbnail container
                var _li = thumb.parents('li');
                
                // if thumbnail is active, fade all the way.
                var _fadeTo = _li.is('.active') ? '1' : '0.3';
                
                // fade in the thumbnail when finnished loading
                thumb.css({display:'none',opacity:_fadeTo}).fadeIn(1500);
                
                // hover effects
                thumb.hover(
                    function() { thumb.fadeTo('fast',1); },
                    function() { _li.not('.active').children('img').fadeTo('fast',0.3); } // don't fade out if the parent is active
                )
            }
        });
    });