$(document).ready(function() {

    $('ul#gallery_thumbs li a').click(function(){
        var src = this.getAttribute('href');
        var description = $(this).html();
        var title_array = this.getAttribute('title').split(': ');
        $('div#gallery_image h3').html(description);
        $('div#gallery_image span.description').html(title_array[0]);
        $('div#gallery_image span.size').html(title_array[1]);
        $('div#gallery_image img').attr('src', src);
        return false;
    });
    
});