var ie  = navigator.appName == "Microsoft Internet Explorer";
var ie6 = navigator.userAgent.match(/MSIE\s6.*/i);
var op  = navigator.userAgent.indexOf('Opera') != -1;
var ns4 = navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) == "4";
var ns6 = navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) > "4";
var moz = navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) > "4";



// �ffnet die aktivierte 2ndLevel und schlie�t alle anderen
function OpenMenu(x,top) {

	if (x != ''){
		//active2ndLevel = x;
		if(ie) {
			showmenu = document.all.menu[x];
	        showmenu.style.visibility = "visible";
	        showmenu.style.top = top;
	
	        var menus = 6;
	        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";
	        showmenu.style.top = top;
	
	        var menus = 6;
	        for (i = 0; i < menus; i++) {
				currentmenu=document.getElementsByName("menu")[i];
	            if ((currentmenu.style.visibility = "visible")&&(currentmenu != showmenu)) currentmenu.style.visibility = "hidden";
	        }
	    }
	}
}

// schlie�t alle 2ndLevels beim Verlassen der Navigation
function Close() {
	var menus = 6;
    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";
    }
	OpenMenu(active2ndLevel, 80);
}