var isNav4 = false; var isIE = false; var isW3C = false;
if (navigator.appName.indexOf("Netscape") != -1) {
	if (parseInt(navigator.appVersion) == 4) { isNav4 = true;}
	else if (parseInt(navigator.appVersion) >= 5) { isW3C = true;}
	}
else { 
	if ((parseInt(navigator.appVersion) >= 4) && (navigator.appName.indexOf("Microsoft") != -1)) { isIE = true;}
	if (navigator.userAgent.indexOf("Opera 5") != -1) { isIE = true;}
	}

function einausblenden(ein,aus)	{
	if (document.getElementById)	{
		var show = document.getElementById(ein).style;	show.display = "block";
		var hide = document.getElementById(aus).style;	hide.display = "none"; 
		}
	}