function hidediv() {
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById('subnav-container').style.visibility = 'hidden';
	} 
}

function showdiv() {
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById('subnav-container').style.visibility = 'visible';
	} 
}