function activate_instant_gallery() {
?>

    <script>

        // Wrap the jQuery code in the generic function to allow use of
        // the $ shortcut in WordPress's no-conflict jQuery environment

        ( function ($) {

            $('#ig-thumbs').delegate('img','click', function(){     // When someone clicks on a thumbnail

                $('#ig-hero').attr('src',$(this).attr('src').replace('-150x150',''));   // Replace the Full Sized version of selected image

                $('#ig-thumbs li img').removeClass("selected");     // Remove "selected" class from all thumbnails
                $(this).addClass("selected");                       // Add "selected" class to selected thumbnail

                $('#ig-title').html($(this).attr('alt'));           // Replace the Title with Title selected image
            });

        })(jQuery);

    </script>

<?php
}

// Hook into footer so gallery becomes active after page loads
add_action('wp_footer','activate_instant_gallery');

?>