function clearSubnavBar() {
	if(document.getElementById('current_link')) {
		document.getElementById('current_link').style.display = "none";
	}
}

function restoreSubnavBar() {
	if(document.getElementById('current_link')) {
		document.getElementById('current_link').style.display = "block";
	}
}

function makeSelected(id) {
	document.getElementById(id).className = "current_link";
}

function makeUnselected(id) {
	document.getElementById(id).className = "";
}