var lastbio;

function togglebio(id) {
	if (lastbio) {
		hide(lastbio);
	}
	if (id != lastbio) {
		show(id);
		lastbio = id;
	} else {
		lastbio = "";
	}
}

function show(id) {
	if (ns5 || ns6) {
		var obj = document.getElementById(id);
		obj.style.visibility = "visible";
	} else if (ie4) {
		document.all[id].style.visibility = "visible";
	} else if (ns4) {
		document.layers[id].visibility = "show";
	}
}

function hide(id) {
	if (ns5 || ns6) {
		var obj = document.getElementById(id);
		obj.style.visibility = "hidden";
	} else if (ie4) {
		document.all[id].style.visibility = "hidden";
	} else if (ns4) {
		document.layers[id].visibility = "hide";
	}
}