// set variables
	var ie = navigator.appName == "Microsoft Internet Explorer";
	var op = navigator.userAgent.indexOf('Opera') != -1;
	var ns6 = navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) > "4";
	var timer = null;


// open menu x
	function OpenMenu(x) {
		if(ie)  {
			showmenu = document.all.menu[x];
			showmenu.style.visibility = "visible";

			var menus = 3;
			for (i = 0; i < document.all.menu.length; i++) {
				currentmenu=document.all.menu[i];
				if ((currentmenu.style.visibility == "visible")&&(currentmenu != showmenu))  {
					currentmenu.style.visibility = "hidden";
				}
			}
		}

		if(ns6 || op) {
			showmenu = document.getElementsByName("menu")[x];
			showmenu.style.visibility = "visible";

			var menus = 3;
			for (i = 0; i < menus; i++) {
				currentmenu=document.getElementsByName("menu")[i];
				if ((currentmenu.style.visibility = "visible")&&(currentmenu != showmenu))  {
					 currentmenu.style.visibility = "hidden";
				}
      			}
		}
	}


// hide all menus
	function Close()   {
        		var menus = 3;
		for (i = 0; i < menus; i++) {
               		if(ie) document.all.menu[i].style.visibility = "hidden";
                		if(ns6 || op) document.getElementsByName("menu")[i].style.visibility = "hidden";
        		}
	}

// hold specific menu x
	function StayAlive(x) {
		if(ie) document.all.menu[x].style.visibility = "visible";
    		if(ns6 || op) document.getElementsByName("menu")[x].style.visibility = "visible";
	}

// close specific menu x
	function CloseMenu(x) {
		if(ie) document.all.menu[x].style.visibility = "hidden";
    		if(ns6 || op) document.getElementsByName("menu")[x].style.visibility = "hidden";
	}