function showOverlayLegal() {
        var o = document.getElementById('Overlay');
        o.style.visibility = 'visible';
        o = document.getElementById('OverlayLegalDisclaimer');
        o.style.visibility = 'visible';
    }
    
    function hideOverlayLegal() {
        var o = document.getElementById('Overlay');
        o.style.visibility = 'hidden';
        o = document.getElementById('OverlayLegalDisclaimer');
        o.style.visibility = 'hidden';
    }
    
    function showOverlayRisk() {
        var o = document.getElementById('Overlay');
        o.style.visibility = 'visible';
        o = document.getElementById('OverlayRiskDisclaimer');
        o.style.visibility = 'visible';
    }
    
    function hideOverlayRisk() {
        var o = document.getElementById('Overlay');
        o.style.visibility = 'hidden';
        o = document.getElementById('OverlayRiskDisclaimer');
        o.style.visibility = 'hidden';
    }

    function showBioDiv(bioId) {
        
        var liArray = document.getElementsByTagName('li');
        for (i in liArray) {
            if (liArray[i].className == "up" || liArray[i].className == "down") {
                liArray[i].setAttribute("class", "up");
            }
        }
        document.getElementById(bioId).setAttribute("class", "down");

        var re = new RegExp("[A-Z]{2,3}div");
        var divArray = document.getElementsByTagName('div');
        
        for (i in divArray) {
            var m = re.test(divArray[i].id);
            if (m) { divArray[i].style.display = 'none'; }
        }
        document.getElementById(bioId + 'div').style.display = 'block';
    }