function adjustLayout()
{
    var services = $$('ul.services').first();
    var top = Math.round(document.viewport.getHeight() / 2.5 - services.getHeight() / 2);
    services.setStyle({
        position: 'relative',
        top: Math.max(top, 0) + 'px'
    });
} // adjustLayout

document.observe('dom:loaded', adjustLayout);