var activeMenu = -1;
	function menu(newActive) //improved menu efficiancy and expandability (RB/RL/011204)
	{
		//alert(newActive);
		//close active menu
		if (newActive != activeMenu) closeMenu();

		activeMenu = newActive;
		
		//note relying on showDiv to trap error
		showDiv("nav"+activeMenu+"content");
		
		//document.getElementById("nav1").class = "leftnavcontentl";
		//alert("nav"+activeMenu);
		document.getElementById("nav"+activeMenu).style.backgroundImage = "url(css/images/butimg1.gif)";
		document.getElementById("nav"+activeMenu).style.color = "white";
		document.getElementById("nav"+activeMenu).style.fontWeight = "bold";

	}
	
	function closeMenu()
	{
		//uses menu Identifier
		if (activeMenu != -1){
			document.getElementById("nav" + activeMenu).style.backgroundImage = "";
			document.getElementById("nav" + activeMenu).style.color = "silver";	
			document.getElementById("nav" + activeMenu).style.fontWeight = "normal";	
			hideDiv("nav" + activeMenu + "content");
			activeMenu = -1;
		}
	}