jQuery(function($) {

    $('.gallery_centred').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
        if(! ($.browser.mozilla && navigator.appVersion.indexOf("Win")!=-1) ) { // FF/Win fades large images terribly slow
          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','Image suivante >>');
      },
      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
        )
      }
    });
  });