//browsererkennung
var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 && parseFloat(navigator.appVersion) >= 4&&parseFloat(navigator.appVersion) < 5) ? 1 : 0;
var isMinNS6 = (isMinNS4 && navigator.userAgent.indexOf("Gecko")>=0) ? 1 : 0;
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.")) >= 0 ? 1 : 0;
var isDOM = (document.getElementById) ? 1 : 0;

version = parseFloat(navigator.appVersion.split("MSIE")[1]);
if ((version >= 5.5) && (version < 7)) {
	var isIE6 = true;
}

//macht entsprechende container sichtbar
function zeigeEbene (id) {
 // if (isMinIE4) document.all[id].style.visibility = "visible" ; 
  if (isMinIE4||isDOM) document.getElementById(id).style.visibility = "visible";
  if (isMinNS4) document.layers[id].visibility = "show";
}

//macht entsprechende container unsichtbar
function verbergeEbene (id) {
 // if (isMinIE4) document.all[id].style.visibility = "hidden";  
  if (isMinIE4||isDOM) document.getElementById(id).style.visibility = "hidden";
  if (isMinNS4) document.layers[id].visibility = "hide";
}

//markiert das hauptmenu in nav.php
function navigation(nr) {
for (i = 1; i <= 7; i++) {
	if (i == nr) {
	zeigeEbene ('navi'+nr+'00');	
	}
	if (i != nr) {
	verbergeEbene ('navi'+i+'00');	
	}
}
if (frozen >'') {
	zeigeEbene ('navi'+frozen+'00');	
}
if (frozen =='3') {
	//subnav('3');
}
if (frozen =='4') {
	//subnav('4');
}
}

//zeigt den entsprechenden submenu-layer in nav.php, nur noch fuer ie 6!!!
function subnav(e) {

	if (isIE6 == true) {
		//alert(e);
		for (i = 1; i <= 7; i++) {
			if (i == e) zeigeEbene('subnavi'+e);
			if (i != e) verbergeEbene('subnavi'+i);
		}
		/*//alert(frozen);*/
		/*if (frozen >'') {*/
		/*	//zeigeEbene ('subnavi'+frozen);	*/
		/*}*/
		/**/
		if (frozen =='3' && e  != 4 && e != 6 && e != 7) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi3');
		}
		if (frozen =='4' && e  != 3 && e != 6 && e != 7) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi4');
		}
		if (frozen =='6' && e  != 3 && e != 4 && e != 7) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi6');
		}
		if (frozen =='7' && e  != 3 && e != 4 && e != 6) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi7');
		}
		/*if (frozen =='4') {*/
		/*	verbergeEbene('subnavi3')*/
		/*	zeigeEbene ('subnavi4');*/
		/*}*/
	} else {
		//alert ('hi');
		//do same, feb 2009
		for (i = 1; i <= 7; i++) {
			if (i == e) zeigeEbene('subnavi'+e);
			if (i != e) verbergeEbene('subnavi'+i);
		}
		/*//alert(frozen);*/
		/*if (frozen >'') {*/
		/*	//zeigeEbene ('subnavi'+frozen);	*/
		/*}*/
		/**/
		if (frozen =='3' && e  != 4 && e != 6 && e != 7) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi3');
		}
		if (frozen =='4' && e  != 3 && e != 6 && e != 7) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi4');
		}
		if (frozen =='6' && e  != 3 && e != 4 && e != 7) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi6');
		}
		if (frozen =='7' && e  != 3 && e != 4 && e != 6) {
			/*verbergeEbene('subnavi4')*/
			zeigeEbene ('subnavi7');
		}
		/*if (frozen =='4') {*/
		/*	verbergeEbene('subnavi3')*/
		/*	zeigeEbene ('subnavi4');*/
		/*}*/
	}
}

//zeigt den entsprechenden submenu-layer in nav.php, nur noch fuer ie 6!!!
function subnavout() {

	if (isIE6 == true) {
		for (i = 1; i <= 7; i++) {
			verbergeEbene('subnavi'+i);
		}
		//alert(frozen);
		if (frozen >'') {
			zeigeEbene ('subnavi'+frozen);	
		}
	} else {
		//alert ('hi');
		//do same, feb 2009
		for (i = 1; i <= 7; i++) {
			verbergeEbene('subnavi'+i);
		}
		//alert(frozen);
		if (frozen >'') {
			zeigeEbene ('subnavi'+frozen);	
		}
	}
}