function unHoverAll() {
    $('li_hardy').className="";
    $('li_joyce').className="";
    $('li_atkinson').className="";
    $('li_jobson').className="";
    $('li_poppenberg').className="";
    $('li_lynch').className="";

    $('bio_hardy').style.display="none";
    $('bio_joyce').style.display="none";
    $('bio_atkinson').style.display="none";
    $('bio_jobson').style.display="none";
    $('bio_poppenberg').style.display="none";
    $('bio_lynch').style.display="none";
}

Event.observe(
    window,
    'load',
    function() {
        Event.observe('li_hardy', 'mouseover', function() { unHoverAll(); $('li_hardy').className="hovered"; $('bio_hardy').style.display="block"; });
        Event.observe('li_joyce', 'mouseover', function() { unHoverAll(); $('li_joyce').className="hovered"; $('bio_joyce').style.display="block"; });
        Event.observe('li_atkinson', 'mouseover', function() { unHoverAll(); $('li_atkinson').className="hovered"; $('bio_atkinson').style.display="block"; });
        Event.observe('li_jobson', 'mouseover', function() { unHoverAll(); $('li_jobson').className="hovered"; $('bio_jobson').style.display="block"; });
        Event.observe('li_poppenberg', 'mouseover', function() { unHoverAll(); $('li_poppenberg').className="hovered"; $('bio_poppenberg').style.display="block"; });
        Event.observe('li_lynch', 'mouseover', function() { unHoverAll(); $('li_lynch').className="hovered"; $('bio_lynch').style.display="block"; });

        unHoverAll();
        $('li_hardy').className="hovered";
        $('bio_hardy').style.display="block";

        $("bio_bob_image").src = "MT_Portrait_Bob.jpg";
        $("bio_ian_image").src = "MT_Portrait_Ian.jpg";
        $("bio_ollie_image").src = "MT_Portrait_Ollie.jpg";
        $("bio_andrew_image").src = "MT_Portrait_Andrew.jpg";
    }

);