function HideContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.visibility = "hidden";
}
function ShowContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.visibility = "visible";
}

function changelink(d) {
if(d.length < 1) { return; }
document.getElementById("bio").style.visibility = "hidden";
document.getElementById("archive").style.visibility = "hidden";
document.getElementById("events").style.visibility = "hidden";
document.getElementById("extlinks").style.visibility = "hidden";
document.getElementById("contact").style.visibility = "hidden";
document.getElementById(d).style.visibility = "visible";
}
function ReverseContentDisplay(d) {
if(d.length < 1) { return; }
if(document.getElementById(d).style.display == "none") { document.getElementById(d).style.display = "block"; }
else { document.getElementById(d).style.display = "none"; }
}