$(document).ready(function() {

    $('.gallery_demo_unstyled').addClass('gallery_demo'); // adds new class name to maintain degradability

    $('ul.gallery_demo').galleria({
        history: false, // 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
				)
        }
    });
});