function hide_content()
{
	for (var i=0; i<arguments.length; i++)
		document.getElementById(arguments[i]).style.display = "none";
}

function show_content()
{
	for (var i=0; i<arguments.length; i++)
		document.getElementById(arguments[i]).style.display = "block";
}

/*function show_bio()
{
	var hash = location.hash;
	var pos = hash.indexOf("#");
	if (pos != -1) show_content(hash.substr(pos+1, 2));
}*/