var menus = new Array('about','prog','policy','outreach','eval','pubs','tools');	
var noNav = "";

function hideNav(){
	stopClean();
	for(i=0;i<menus.length;i++){
		document.getElementById(menus[i]).style.display = 'none';
	}
}
		
function layerMgr(menu){
	hideNav();
	//document.getElementById(menu).style.left = posleft-30+"px";
	document.getElementById(menu).style.display = "block";
}

function cleanUp(){
	noNav = setTimeout("hideNav()",3000);
}

function stopClean(){
	clearTimeout(noNav);
}