jQuery(document).ready(function() {
    $("#btn_pong").click(function() {
        $Game = $('#pong_game_holder');
        $Game.css("top", (($(window).height() - $Game.outerHeight()) / 2) + $(window).scrollTop() + "px");
        $Game.css("left", (($(window).width() - $Game.outerWidth()) / 2) + $(window).scrollLeft() + "px");
        $Game.fadeIn('slow');
    });

    $("#pong_close").click(function() {
        $('#pong_game_holder').fadeOut('slow');
    });
});