function displayFBar(obj, sender)
{
    document.getElementById('fb-patient').style.display = obj != 'fb-patient' ? 'none' : 'block';
    document.getElementById('fb-services').style.display = obj != 'fb-services' ? 'none' : 'block';
    document.getElementById('fb-careers').style.display = obj != 'fb-careers' ? 'none' : 'block';

    var lis = $$('li.selected');
    lis.each(function(el){
        el.className = '';
    });

    sender.parentNode.className = "selected";
    animateDisplayFBar(obj);
}  //  displayFBar

function animateDisplayFBar(obj)
{
    var ani = new Fx.Style(obj, 'opacity', {duration: 500});
    ani.set(0);
    ani.start(0, 0.8);
}  //  animateDisplayFBar