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    function updateSlideshow(itemclass) {
        itemclass = itemclass.replace(/item-/, '');

        $('.main_image').attr('background', slideshow[itemclass].bg);
        $('.main_image img').fadeOut('normal', function() {
            $(this).attr('src', slideshow[itemclass].bg);
            $(this).attr('alt', slideshow[itemclass].alt);
            $(this).fadeIn();
        });
        $('.main_image h2').html(slideshow[itemclass].title);
        $('.main_image p').html(slideshow[itemclass].copy);
        $('.desc a').attr('href', slideshow[itemclass].link);
    }