$(document).ready(function(){
$('.gallery_demo_unstyled').addClass('gallery_demo'); // adds new class name to maintain degradability
        	$('ul.gallery_demo li:first').addClass('active');
			$('ul.gallery_demo').galleria({
				history   : true, // activates the history object for bookmarking, back-button etc.
				clickNext : true, // helper for making the image clickable
				insert    : '#big_pic', // 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','下一张图片');
			},
				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
					)
				}
			});
});