/*if (navigator.appVersion.charAt (0)<'5') {
	var layers=document.all.tags ("div");
} else {
	var layers=document.getElementsByTagName("div");
}*/

if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
	visibleval = "show";
	hiddenval = "hide";
} else {
	visibleval = "visible";
	hiddenval = "hidden";
}

/*
function menu (i) {
	

	switch(i) {
		
		case 1: {
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
				window.document.b.visibility="show";
				window.document.m1.visibility="show";
				window.document.m2.visibility="hide";
				window.document.m3.visibility="hide";
				window.document.m4.visibility="hide";
				window.document.m5.visibility="hide";
				window.document.m6.visibility="hide";
				return;
			}
			
			layers[0].style.visibility='visible';
			layers[2].style.visibility='visible';
			layers[4].style.visibility='hidden';
			layers[6].style.visibility='hidden';
			layers[8].style.visibility='hidden';
			layers[10].style.visibility='hidden';
			layers[12].style.visibility='hidden';
			layers[13].style.visibility='visible';
			return;
		}
		case 2: {
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
				window.document.b.visibility="show";
				window.document.m1.visibility="hide";
				window.document.m2.visibility="show";
				window.document.m3.visibility="hide";
				window.document.m4.visibility="hide";
				window.document.m5.visibility="hide";
				window.document.m6.visibility="hide";
				window.document.memoryscroller.visibility="show";
				return;
			}
			
			layers[0].style.visibility='visible';
			layers[2].style.visibility='hidden';
			layers[4].style.visibility='visible';
			layers[6].style.visibility='hidden';
			layers[8].style.visibility='hidden';
			layers[10].style.visibility='hidden';
			layers[12].style.visibility='hidden';
			return;
		}
		case 3: {
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
				window.document.b.visibility="show";
				window.document.m1.visibility="hide";
				window.document.m2.visibility="hide";
				window.document.m3.visibility="show";
				window.document.m4.visibility="hide";
				window.document.m5.visibility="hide";
				window.document.m6.visibility="hide";
				window.document.memoryscroller.visibility="show";
				return;
			}
			
			layers[0].style.visibility='visible';
			layers[2].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[6].style.visibility='visible';
			layers[8].style.visibility='hidden';
			layers[10].style.visibility='hidden';
			layers[12].style.visibility='hidden';
			return;
		}
		case 4: {
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
				window.document.b.visibility="show";
				window.document.m1.visibility="hide";
				window.document.m2.visibility="hide";
				window.document.m3.visibility="hide";
				window.document.m4.visibility="show";
				window.document.m5.visibility="hide";
				window.document.m6.visibility="hide"
				window.document.memoryscroller.visibility="show";
				return;
			}
			
			layers[0].style.visibility='visible';
			layers[2].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[6].style.visibility='hidden';
			layers[8].style.visibility='visible';
			layers[10].style.visibility='hidden';
			layers[12].style.visibility='hidden';
			return;
		}
		case 5: {
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
				window.document.b.visibility="show";
				window.document.m1.visibility="hide";
				window.document.m2.visibility="hide";
				window.document.m3.visibility="hide";
				window.document.m4.visibility="hide";
				window.document.m5.visibility="show";
				window.document.m6.visibility="hide";
				window.document.memoryscroller.visibility="show";
				return;
			}
			
			layers[0].style.visibility='visible';
			layers[2].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[6].style.visibility='hidden';
			layers[8].style.visibility='hidden';
			layers[10].style.visibility='visible';
			layers[12].style.visibility='hidden'
			return;
		}
		
		case 6: {
			if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt(0)<'5')) {
				window.document.b.visibility="show";
				window.document.m1.visibility="hide";
				window.document.m2.visibility="hide";
				window.document.m3.visibility="hide";
				window.document.m4.visibility="hide";
				window.document.m5.visibility="hide";
				window.document.m6.visibility="show";
				window.document.memoryscroller.visibility="show";
				return;
			}
			
			layers[0].style.visibility='visible';
			layers[2].style.visibility='hidden';
			layers[4].style.visibility='hidden';
			layers[6].style.visibility='hidden';
			layers[8].style.visibility='hidden';
			layers[10].style.visibility='hidden';
			layers[12].style.visibility='visible'
			return;
		}
	
	} //end switch

} //end function

function clean () {
	if ((navigator.appName=='Netscape') && (navigator.appVersion.charAt (0)<'5')) {
		window.document.b.visibility="hide";
		window.document.m1.visibility="hide";
		window.document.m2.visibility="hide";
		window.document.m3.visibility="hide";
		window.document.m4.visibility="hide";
		window.document.m5.visibility="hide";
		window.document.m6.visibility="hide";
		window.document.memoryscroller.visibility="show";
		return;
	}
	
	layers[0].style.visibility='hidden';
	layers[2].style.visibility='hidden';
	layers[4].style.visibility='hidden';
	layers[6].style.visibility='hidden';
	layers[8].style.visibility='hidden';
	layers[10].style.visibility='hidden';
	layers[12].style.visibility='hidden';
	layers["memoryscroller"].style.visibility='show';
	return;
}

*/

function menu(id) {
	for (i=1;i<=3;i++) {
		//6 menüpunkte durchzugehen
		var divcontainer = document.getElementById('m' + i);
        if (!divcontainer) {
            return false;
        }
        //if (el.style.display == 'none') {
        if (id == i) {
            divcontainer.style.visibility = visibleval;
        } else {
            divcontainer.style.visibility = hiddenval;
        }
	}
}