var fadein_time = 1000; 
var default_opac = 0.9;
$(document).ready(function(){		
$('.gallery_demo_unstyled').addClass('gallery_demo'); // adds new class name to maintain degradability
$('.nav').css('display','none'); // hides the nav initially

$('ul.gallery_demo').galleria({
history   : false,
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(fadein_time);
caption.css('display','none').fadeIn(fadein_time);

// fetch the thumbnail container
var _li = thumb.parents('li');

// fade out inactive thumbnail
_li.siblings().children('img.selected').fadeTo(fadein_time,default_opac);

// fade in active thumbnail
thumb.fadeTo('fast',1).addClass('selected');

// add a title for the clickable image
image.attr('title','');
},
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' : default_opac;

// fade in the thumbnail when finnished loading
thumb.css({display:'none',opacity:_fadeTo}).fadeIn(fadein_time);

// hover effects
thumb.hover(
function() { thumb.fadeTo('fast',1); },
function() { _li.not('.active').children('img').fadeTo('fast',default_opac); } // don't fade out if the parent is active
)
}
});
});