Shadowbox.loadSkin('classic', '/JS/ShadowBox/skin');
Shadowbox.loadLanguage('nl', '/JS/ShadowBox/lang');
Shadowbox.loadPlayer(['iframe'], '/JS/ShadowBox/player');

$(window).load(function() {
    var options = {
        overlayOpacity: 0.8
    };
    Shadowbox.init(options);
});