function showDiv(layer_ref) {
	if (document.all) { // IS IE 4 or 5 (or 6 beta)
		eval("document.all." + layer_ref + ".style.visibility = 'visible'");
	}
	if (document.layers) { // IS NETSCAPE 4 or below
		document.layers[layer_ref].visibility = 'visible';
	}
	if (document.getElementById && !document.all) {
		document.getElementById(layer_ref).style.visibility = 'visible';
	}
	return false;
}

function hideDiv(layer_ref) {
	if (document.all) { // IS IE 4 or 5 (or 6 beta)
		eval("document.all." + layer_ref + ".style.visibility = 'hidden'");
	}
	if (document.layers) { // IS NETSCAPE 4 or below
		document.layers[layer_ref].visibility = 'hidden';
	}
	if (document.getElementById && !document.all) {
		document.getElementById(layer_ref).style.visibility = 'hidden';
	}
	return false;
}