function Browser() {
	var b=navigator.appName;
	if (b.indexOf('Netscape')!=-1) this.b="ns";
	else if ((b=="Opera") || (navigator.userAgent.indexOf("Opera")>0)) this.b = "opera";
	else if (b=="Microsoft Internet Explorer") this.b="ie";
	if (!b) alert('Unidentified browser.\nThis browser is not supported,');
	this.version=navigator.appVersion;
	this.v=parseInt(this.version);
	this.ns=(this.b=="ns" && this.v>=4);
	this.ns4=(this.b=="ns" && this.v==4);
	this.ns6=(this.b=="ns" && this.v==5);
	this.ie=(this.b=="ie" && this.v>=4);
	this.ie4=(this.version.indexOf('MSIE 4')>0);
	this.ie5=(this.version.indexOf('MSIE 5')>0);
	this.ie55=(this.version.indexOf('MSIE 5.5')>0);
	this.ie6=(this.version.indexOf('MSIE 6.0')>0);
	this.opera=(this.b=="opera");
	this.dom=(document.createElement && document.appendChild && document.getElementsByTagName)?true:false;
	this.def=(this.ie||this.dom); // most used browsers, for faster if loops
	var ua=navigator.userAgent.toLowerCase();
	if (ua.indexOf("win")>-1) this.platform="win32";
	else if (ua.indexOf("mac")>-1) this.platform="mac";
	else this.platform="other";
}

function BrowserCheck()
	{
	is=new Browser();

	DerUserAgent = navigator.userAgent.toLowerCase();
	Agent = "undefined";
	if (DerUserAgent.indexOf("msie") > -1 && is.b == "ie") Agent = "MSIE";
	if (DerUserAgent.indexOf("opera") > -1 && is.b == "opera") Agent = "Opera";
	if (DerUserAgent.indexOf("netscape") > -1 && is.b == "ns") Agent = "Netscape";
	if (DerUserAgent.indexOf("netscape") == -1 && is.b == "ns") Agent = "Mozilla";
	if (DerUserAgent.indexOf("firefox") > -1 && is.b == "ns") Agent = "Firefox";

	if (Agent == "")
		{ Agent = "unbekannt"; }

	return Agent;
	}