var isIE, isNN6p;

// Sets browser
if (document.all) isIE = true
else if (document.getElementById) isNN6p = true;

// function to hide all subnavs
function hideSubNavs() {
	if (isIE) {
		document.all["mask"].style.visibility = "hidden";
		document.all["nav2_wbs"].style.visibility = "hidden";
	} else if (isNN6p) {
		document.getElementById("mask").style.visibility = "hidden";
		document.getElementById("nav2_wbs").style.visibility = "hidden";
	}
}

function showNav(nav) {
	if (isIE) {
		document.all["mask"].style.visibility = "visible";
		document.all[nav].style.visibility = "visible";
	} else if (isNN6p) {
		document.getElementById("mask").style.visibility = "visible";
		document.getElementById(nav).style.visibility = "visible";
	}
}