<!--
	var IE4 = (document.all); 
	var NS4 = (document.layers);	
	var NS5 = (document.getElementById);
	if (IE4) {NS5=false;}
	
	var activeMenu = '';
	var menuName = '';

	/*var arrowImg = new Object();
	arrowImg.on = new Image();
	arrowImg.on.src = "<img src="graphics/leftnav_arrow_on.gif" border="0">";
	arrowImg.off = new Image();
	arrowImg.off.src = "<img src="graphics/leftnav_arrow.gif" border="0">";
	*/
	//if (document.images) {
	//	var on = new Image();
	//	on.src = 'graphics/leftnav_arrow_on.gif';
	//	var off = new Image();
	//	off.src = 'graphics/leftnav_arrow.gif';
	//}	
	
    function showMenu(menuName){
		//if (document.images) {document[menuName].src = eval('on.src');}
		if (IE4){
			if(document.all(menuName) != null){
				document.all(menuName).style.visibility = 'visible';
			}
		}
		else if (NS4){
			if(document.layers[menuName] != null){
				document.layers[menuName].visibility = 'visible';
			}
		}
		else if (NS5){
			if(document.getElementById(menuName) != null){
				document.getElementById(menuName).style.visibility = 'visible';
				
			}
		}
		if (activeMenu != menuName){
			hideMenu(activeMenu);
			activeMenu = menuName;
		}
	}
	
	function hideMenu(menuName){
		//if (activeMenu!=''){
			//if (document.images) {document[activeMenu].src = eval('off.src');}
		//}
		if (IE4){
			if(document.all(activeMenu) != null){
				document.all(activeMenu).style.visibility = 'hidden';
			}
		}
		else if (NS4){
			if(document.layers[activeMenu] != null){
				document.layers[activeMenu].visibility = 'hidden';
			}
		}
		else if (NS5){
			if(document.getElementById(menuName) != null){
				document.getElementById(menuName).style.visibility = 'hidden';
			}
		}
		activeMenu = '';
	}
    //-->
